diff --git a/app/core/src/main/java/stirling/software/SPDF/controller/api/MultiPageLayoutController.java b/app/core/src/main/java/stirling/software/SPDF/controller/api/MultiPageLayoutController.java
index dee51b75a..7cc53994e 100644
--- a/app/core/src/main/java/stirling/software/SPDF/controller/api/MultiPageLayoutController.java
+++ b/app/core/src/main/java/stirling/software/SPDF/controller/api/MultiPageLayoutController.java
@@ -27,6 +27,7 @@ import lombok.extern.slf4j.Slf4j;
 
 import stirling.software.SPDF.model.api.general.MergeMultiplePagesRequest;
 import stirling.software.common.service.CustomPDFDocumentFactory;
+import stirling.software.common.util.ExceptionUtils;
 import stirling.software.common.util.FormUtils;
 import stirling.software.common.util.GeneralUtils;
 import stirling.software.common.util.WebResponseUtils;
@@ -49,26 +50,113 @@ public class MultiPageLayoutController {
     public ResponseEntity<byte[]> mergeMultiplePagesIntoOne(
             @ModelAttribute MergeMultiplePagesRequest request) throws IOException {
 
-        int pagesPerSheet = request.getPagesPerSheet();
-        MultipartFile file = request.getFileInput();
-        boolean addBorder = Boolean.TRUE.equals(request.getAddBorder());
+        int MAX_PAGES = 100000;
+        int MAX_COLS = 300;
+        int MAX_ROWS = 300;
 
-        if (pagesPerSheet != 2
-                && pagesPerSheet != 3
-                && pagesPerSheet != (int) Math.sqrt(pagesPerSheet) * Math.sqrt(pagesPerSheet)) {
-            throw new IllegalArgumentException("pagesPerSheet must be 2, 3 or a perfect square");
+        String mode = request.getMode();
+        if (mode == null || mode.trim().isEmpty()) {
+            mode = "DEFAULT";
         }
 
-        int cols =
-                pagesPerSheet == 2 || pagesPerSheet == 3
-                        ? pagesPerSheet
-                        : (int) Math.sqrt(pagesPerSheet);
-        int rows = pagesPerSheet == 2 || pagesPerSheet == 3 ? 1 : (int) Math.sqrt(pagesPerSheet);
+        int rows;
+        int cols;
+        int pagesPerSheet;
+        switch (mode) {
+            case "DEFAULT":
+                pagesPerSheet = request.getPagesPerSheet();
+                if (pagesPerSheet != 2
+                        && pagesPerSheet != 3
+                        && pagesPerSheet
+                                != (int) Math.sqrt(pagesPerSheet) * Math.sqrt(pagesPerSheet)) {
+                    throw ExceptionUtils.createIllegalArgumentException(
+                            "error.invalidFormat",
+                            "Invalid {0} format: {1}",
+                            "pagesPerSheet",
+                            "only 2, 3, and perfect squares are supported");
+                }
+
+                cols =
+                        pagesPerSheet == 2 || pagesPerSheet == 3
+                                ? pagesPerSheet
+                                : (int) Math.sqrt(pagesPerSheet);
+                rows =
+                        pagesPerSheet == 2 || pagesPerSheet == 3
+                                ? 1
+                                : (int) Math.sqrt(pagesPerSheet);
+                break;
+            case "CUSTOM":
+                rows = request.getRows();
+                cols = request.getCols();
+                if (rows <= 0 || cols <= 0) {
+                    throw ExceptionUtils.createIllegalArgumentException(
+                            "error.invalidFormat",
+                            "Invalid {0} format: {1}",
+                            "rows and cols",
+                            "only strictly positive values are allowed");
+                }
+                pagesPerSheet = cols * rows;
+                break;
+            default:
+                throw ExceptionUtils.createIllegalArgumentException(
+                        "error.invalidFormat",
+                        "Invalid {0} format: {1}",
+                        "mode",
+                        "only 'DEFAULT' and 'CUSTOM' are supported");
+        }
+
+        if (pagesPerSheet > MAX_PAGES) {
+            throw ExceptionUtils.createIllegalArgumentException(
+                    "error.invalidArgument",
+                    "Invalid {0} format: {1}",
+                    "pagesPerSheet",
+                    "must be less than " + MAX_PAGES);
+        }
+        if (cols > MAX_COLS) {
+            throw ExceptionUtils.createIllegalArgumentException(
+                    "error.invalidArgument",
+                    "Invalid {0} format: {1}",
+                    "cols",
+                    "must be less than " + MAX_COLS);
+        }
+        if (rows > MAX_ROWS) {
+            throw ExceptionUtils.createIllegalArgumentException(
+                    "error.invalidArgument",
+                    "Invalid {0} format: {1}",
+                    "rows",
+                    "must be less than " + MAX_ROWS);
+        }
+
+        MultipartFile file = request.getFileInput();
+        String orientation = request.getOrientation();
+        if (orientation == null || orientation.trim().isEmpty()) {
+            orientation = "PORTRAIT";
+        }
+        if (!"PORTRAIT".equals(orientation) && !"LANDSCAPE".equals(orientation)) {
+            throw ExceptionUtils.createIllegalArgumentException(
+                    "error.invalidFormat",
+                    "Invalid {0} format: {1}",
+                    "orientation",
+                    "only 'PORTRAIT' and 'LANDSCAPE' are supported");
+        }
+        String pageOrder = request.getPageOrder();
+        if (pageOrder == null || pageOrder.trim().isEmpty()) {
+            pageOrder = "LR_TD";
+        }
+
+        boolean addBorder = Boolean.TRUE.equals(request.getAddBorder());
 
         PDDocument sourceDocument = pdfDocumentFactory.load(file);
         PDDocument newDocument =
                 pdfDocumentFactory.createNewDocumentBasedOnOldDocument(sourceDocument);
-        PDPage newPage = new PDPage(PDRectangle.A4);
+
+        // Create a new A4 landscape rectangle that we use when orientation is landscape
+        PDRectangle a4Landscape =
+                new PDRectangle(PDRectangle.A4.getHeight(), PDRectangle.A4.getWidth());
+        PDPage newPage =
+                "PORTRAIT".equals(orientation)
+                        ? new PDPage(PDRectangle.A4)
+                        : new PDPage(a4Landscape);
         newDocument.addPage(newPage);
 
         int totalPages = sourceDocument.getNumberOfPages();
@@ -88,7 +176,10 @@ public class MultiPageLayoutController {
             if (i != 0 && i % pagesPerSheet == 0) {
                 // Close the current content stream and create a new page and content stream
                 contentStream.close();
-                newPage = new PDPage(PDRectangle.A4);
+                newPage =
+                        "PORTRAIT".equals(orientation)
+                                ? new PDPage(PDRectangle.A4)
+                                : new PDPage(a4Landscape);
                 newDocument.addPage(newPage);
                 contentStream =
                         new PDPageContentStream(
@@ -108,8 +199,36 @@ public class MultiPageLayoutController {
             int adjustedPageIndex =
                     i % pagesPerSheet; // Close the current content stream and create a new
             // page and content stream
-            int rowIndex = adjustedPageIndex / cols;
-            int colIndex = adjustedPageIndex % cols;
+            int rowIndex;
+            int colIndex;
+
+            switch (pageOrder) {
+                case "LR_TD": // Left→Right, then Top→Down
+                    rowIndex = adjustedPageIndex / cols;
+                    colIndex = adjustedPageIndex % cols;
+                    break;
+
+                case "RL_TD": // Right→Left, then Top→Down
+                    rowIndex = adjustedPageIndex / cols;
+                    colIndex = cols - 1 - (adjustedPageIndex % cols);
+                    break;
+
+                case "TD_LR": // Top→Down, then Left→Right
+                    colIndex = adjustedPageIndex / rows;
+                    rowIndex = adjustedPageIndex % rows;
+                    break;
+
+                case "TD_RL": // Top→Down, then Right→Left
+                    colIndex = cols - 1 - (adjustedPageIndex / rows);
+                    rowIndex = adjustedPageIndex % rows;
+                    break;
+                default:
+                    throw ExceptionUtils.createIllegalArgumentException(
+                            "error.invalidFormat",
+                            "Invalid {0} format: {1}",
+                            "pageOrder",
+                            "only 'LR_TD', 'RL_TD', 'TD_LR', and 'TD_RL' are supported");
+            }
 
             float x = colIndex * cellWidth + (cellWidth - rect.getWidth() * scale) / 2;
             float y =
@@ -139,7 +258,7 @@ public class MultiPageLayoutController {
 
         // If any source page is rotated, skip form copying/transformation entirely
         boolean hasRotation = FormUtils.hasAnyRotatedPage(sourceDocument);
-        if (hasRotation) {
+        if (hasRotation || "LANDSCAPE".equals(orientation)) {
             log.info("Source document has rotated pages; skipping form field copying.");
         } else {
             try {
diff --git a/app/core/src/main/java/stirling/software/SPDF/model/api/general/MergeMultiplePagesRequest.java b/app/core/src/main/java/stirling/software/SPDF/model/api/general/MergeMultiplePagesRequest.java
index 6d9254023..8abfb1b2f 100644
--- a/app/core/src/main/java/stirling/software/SPDF/model/api/general/MergeMultiplePagesRequest.java
+++ b/app/core/src/main/java/stirling/software/SPDF/model/api/general/MergeMultiplePagesRequest.java
@@ -10,15 +10,53 @@ import stirling.software.common.model.api.PDFFile;
 @Data
 @EqualsAndHashCode(callSuper = true)
 public class MergeMultiplePagesRequest extends PDFFile {
+    @Schema(
+            description = "Input mode: DEFAULT uses pagesPerSheet; CUSTOM uses explicit cols×rows.",
+            requiredMode = Schema.RequiredMode.REQUIRED,
+            type = "string",
+            defaultValue = "DEFAULT",
+            allowableValues = {"DEFAULT", "CUSTOM"})
+    private String mode;
 
     @Schema(
             description = "The number of pages to fit onto a single sheet in the output PDF.",
             type = "number",
             defaultValue = "2",
-            requiredMode = Schema.RequiredMode.REQUIRED,
             allowableValues = {"2", "3", "4", "9", "16"})
     private int pagesPerSheet;
 
+    @Schema(
+            description = "Options for the ordering of pages",
+            type = "string",
+            defaultValue = "LR_TD",
+            allowableValues = {"LR_TD", "RL_TD", "TD_LR", "TD_RL"})
+    private String pageOrder;
+
+    @Schema(
+            description = "Number of rows",
+            type = "number",
+            defaultValue = "1",
+            maximum = "300",
+            minimum = "1",
+            example = "3")
+    private Integer rows;
+
+    @Schema(
+            description = "Number of columns",
+            type = "number",
+            defaultValue = "2",
+            maximum = "300",
+            minimum = "1",
+            example = "2")
+    private Integer cols;
+
+    @Schema(
+            description = "The orientation of the output PDF pages",
+            type = "string",
+            defaultValue = "PORTRAIT",
+            allowableValues = {"PORTRAIT", "LANDSCAPE"})
+    private String orientation;
+
     @Schema(description = "Boolean for if you wish to add border around the pages")
     private Boolean addBorder;
 }
diff --git a/app/core/src/main/resources/messages_en_GB.properties b/app/core/src/main/resources/messages_en_GB.properties
index e4c6378f1..6762e021c 100644
--- a/app/core/src/main/resources/messages_en_GB.properties
+++ b/app/core/src/main/resources/messages_en_GB.properties
@@ -1166,7 +1166,20 @@ pipeline.title=Pipeline
 #pageLayout
 pageLayout.title=Multi Page Layout
 pageLayout.header=Multi Page Layout
+pageLayout.mode=Mode
+pageLayout.custom=Custom
 pageLayout.pagesPerSheet=Pages per sheet:
+pageLayout.rows=Rows
+pageLayout.columns=Columns
+pageLayout.advancedSettings=Advanced settings
+pageLayout.pageOrder=Page order :
+pageLayout.leftRightTopDown=Left -> Right, then Top -> Bottom
+pageLayout.rightLeftTopDown=Right -> Left, then Top -> Bottom
+pageLayout.topDownLeftRight=Top -> Bottom, then Left -> Right
+pageLayout.topDownRightLeft=Top -> Bottom, then Right -> Left
+pageLayout.orientation=Orientation :
+pageLayout.portrait=Portrait
+pageLayout.landscape=Landscape
 pageLayout.addBorder=Add Borders
 pageLayout.submit=Submit
 
diff --git a/app/core/src/main/resources/messages_en_US.properties b/app/core/src/main/resources/messages_en_US.properties
index 287955226..392e95c2b 100644
--- a/app/core/src/main/resources/messages_en_US.properties
+++ b/app/core/src/main/resources/messages_en_US.properties
@@ -616,6 +616,10 @@ home.cbrToPdf.title=CBR to PDF
 home.cbrToPdf.desc=Convert CBR comic book archives to PDF format.
 cbrToPdf.tags=conversion,comic,book,archive,cbr,rar
 
+home.ebookToPdf.title=eBook to PDF
+home.ebookToPdf.desc=Convert eBook files (EPUB, MOBI, AZW3, FB2, TXT, DOCX) to PDF using Calibre.
+ebookToPdf.tags=conversion,ebook,calibre,epub,mobi,azw3
+
 home.pdfToCbz.title=PDF to CBZ
 home.pdfToCbz.desc=Convert PDF files to CBZ comic book archives.
 pdfToCbz.tags=conversion,comic,book,archive,cbz,pdf
@@ -1162,7 +1166,20 @@ pipeline.title=Pipeline
 #pageLayout
 pageLayout.title=Multi Page Layout
 pageLayout.header=Multi Page Layout
+pageLayout.mode=Mode
+pageLayout.custom=Custom
 pageLayout.pagesPerSheet=Pages per sheet:
+pageLayout.rows=Rows
+pageLayout.columns=Columns
+pageLayout.advancedSettings=Advanced settings
+pageLayout.pageOrder=Page order :
+pageLayout.leftRightTopDown=Left -> Right, then Top -> Bottom
+pageLayout.rightLeftTopDown=Right -> Left, then Top -> Bottom
+pageLayout.topDownLeftRight=Top -> Bottom, then Left -> Right
+pageLayout.topDownRightLeft=Top -> Bottom, then Right -> Left
+pageLayout.orientation=Orientation :
+pageLayout.portrait=Portrait
+pageLayout.landscape=Landscape
 pageLayout.addBorder=Add Borders
 pageLayout.submit=Submit
 
@@ -1490,6 +1507,17 @@ cbrToPDF.submit=Convert to PDF
 cbrToPDF.selectText=Select CBR file
 cbrToPDF.optimizeForEbook=Optimize PDF for ebook readers (uses Ghostscript)
 
+#ebookToPDF
+ebookToPDF.title=eBook to PDF
+ebookToPDF.header=eBook to PDF
+ebookToPDF.submit=Convert to PDF
+ebookToPDF.selectText=Select eBook file
+ebookToPDF.embedAllFonts=Embed all fonts in the output PDF (may increase file size)
+ebookToPDF.includeTableOfContents=Add a generated table of contents to the PDF
+ebookToPDF.includePageNumbers=Add page numbers to the generated PDF
+ebookToPDF.optimizeForEbook=Optimize PDF for ebook readers (uses Ghostscript)
+ebookToPDF.calibreDisabled=Calibre support is disabled. Enable the Calibre tool group or install Calibre to use this feature.
+
 #pdfToCBR
 pdfToCBR.title=PDF to CBR
 pdfToCBR.header=PDF to CBR
diff --git a/app/core/src/main/resources/messages_fr_FR.properties b/app/core/src/main/resources/messages_fr_FR.properties
index 64e624dc4..0fc32e66b 100644
--- a/app/core/src/main/resources/messages_fr_FR.properties
+++ b/app/core/src/main/resources/messages_fr_FR.properties
@@ -76,7 +76,7 @@ lang.kir=Kirghize, Kyrgyz
 lang.kmr=Kurmandji (Kurde du Nord)
 lang.kor=Coréen
 lang.kor_vert=Coréen (Vertical)
-lang.lao=Laotien 
+lang.lao=Laotien
 lang.lat=Latin
 lang.lav=Letton
 lang.lit=Lituanien
@@ -616,6 +616,10 @@ home.cbrToPdf.title=CBR en PDF
 home.cbrToPdf.desc=Convertissez une archive de bande dessinée CBR en PDF.
 cbrToPdf.tags=bande dessinée,convertir,conversion,comic,book,archive,cbr,rar
 
+home.ebookToPdf.title=eBook to PDF
+home.ebookToPdf.desc=Convert eBook files (EPUB, MOBI, AZW3, FB2, TXT, DOCX) to PDF using Calibre.
+ebookToPdf.tags=conversion,ebook,calibre,epub,mobi,azw3
+
 home.pdfToCbz.title=PDF en CBZ
 home.pdfToCbz.desc=Convertissez un fichier PDF en archive de bande dessinée CBZ.
 pdfToCbz.tags=bande dessinée,convertir,conversion,comic,book,archive,cbz,pdf
@@ -1162,7 +1166,20 @@ pipeline.title=Pipeline
 #pageLayout
 pageLayout.title=Fusionner des pages
 pageLayout.header=Fusionner des pages
+pageLayout.mode=Mode
+pageLayout.custom=Custom
 pageLayout.pagesPerSheet=Pages par feuille
+pageLayout.rows=Rows
+pageLayout.columns=Columns
+pageLayout.advancedSettings=Advanced settings
+pageLayout.pageOrder=Page order :
+pageLayout.leftRightTopDown=Left -> Right, then Top -> Bottom
+pageLayout.rightLeftTopDown=Right -> Left, then Top -> Bottom
+pageLayout.topDownLeftRight=Top -> Bottom, then Left -> Right
+pageLayout.topDownRightLeft=Top -> Bottom, then Right -> Left
+pageLayout.orientation=Orientation :
+pageLayout.portrait=Portrait
+pageLayout.landscape=Paysage
 pageLayout.addBorder=Ajouter des bordures
 pageLayout.submit=Fusionner
 
@@ -1490,6 +1507,17 @@ cbrToPDF.submit=Convertir en PDF
 cbrToPDF.selectText=Sélectionnez un fichier CBR
 cbrToPDF.optimizeForEbook=Optimiser un PDF pour une liseuse (utilise Ghostscript)
 
+#ebookToPDF
+ebookToPDF.title=eBook to PDF
+ebookToPDF.header=eBook to PDF
+ebookToPDF.submit=Convert to PDF
+ebookToPDF.selectText=Select eBook file
+ebookToPDF.embedAllFonts=Embed all fonts in the output PDF (may increase file size)
+ebookToPDF.includeTableOfContents=Add a generated table of contents to the PDF
+ebookToPDF.includePageNumbers=Add page numbers to the generated PDF
+ebookToPDF.optimizeForEbook=Optimize PDF for ebook readers (uses Ghostscript)
+ebookToPDF.calibreDisabled=Calibre support is disabled. Enable the Calibre tool group or install Calibre to use this feature.
+
 #pdfToCBR
 pdfToCBR.title=PDF en CBR
 pdfToCBR.header=PDF en CBR
diff --git a/app/core/src/main/resources/templates/multi-page-layout.html b/app/core/src/main/resources/templates/multi-page-layout.html
index 0a8f5ebb3..2749111ed 100644
--- a/app/core/src/main/resources/templates/multi-page-layout.html
+++ b/app/core/src/main/resources/templates/multi-page-layout.html
@@ -18,9 +18,13 @@
               </div>
               <form id="multiPdfForm" th:action="@{'/api/v1/general/multi-page-layout'}" method="post" enctype="multipart/form-data">
                 <div th:replace="~{fragments/common :: fileSelector(name='fileInput', multipleInputsForSingleRequest=false, accept='application/pdf')}"></div>
-                <div class="mb-3">
+                <div class="form-check mb-3">
+                  <input type="checkbox" id="modeCustom">
+                  <label for="modeCustom" th:text="#{pageLayout.custom}"></label>
+                </div>
+                <div id="defaultSection" class="mb-3" style="border:1px solid #eee; padding:1em; border-radius:8px; margin-bottom:1em;">
                   <label for="pagesPerSheet" th:text="#{pageLayout.pagesPerSheet}"></label>
-                  <select class="form-control" id="pagesPerSheet" name="pagesPerSheet">
+                  <select class="form-control" id="pagesPerSheet" name="pagesPerSheet" required>
                     <option value="2">2</option>
                     <option value="3">3</option>
                     <option value="4">4</option>
@@ -28,12 +32,91 @@
                     <option value="16">16</option>
                   </select>
                 </div>
+                <div id="customSection" class="mb-3" style="border:1px solid #eee; padding:1em; border-radius:8px; margin-bottom:1em;">
+                  <div class="mb-3">
+                    <label for="rows" th:text="#{pageLayout.rows}"></label>
+                    <input class="form-control" type="number" id="rows" name="rows" step="1" min="1" max="300" value="1" required>
+                  </div>
+                  <div class="mb-3">
+                    <label for="cols" th:text="#{pageLayout.columns}"></label>
+                    <input class="form-control" type="number" id="cols" name="cols" step="1" min="1" max="300" value="1" required>
+                  </div>
+                </div>
                 <div class="form-check mb-3">
-                  <input id="addBorder" name="addBorder" type="checkbox">
-                  <label for="addBorder" th:text="#{pageLayout.addBorder}"></label>
+                  <input id="advancedSettingsToggle" type="checkbox">
+                  <label for="advancedSettingsToggle" th:text="#{pageLayout.advancedSettings}"></label>
+                </div>
+                <div id="advancedSettings" style="display:none; border:1px solid #eee; padding:1em; border-radius:8px; margin-bottom:1em;">
+                  <div class="mb-3">
+                    <label for="pageOrder" th:text="#{pageLayout.pageOrder}"></label>
+                    <select class="form-control" id="pageOrder" name="pageOrder">
+                      <option value="LR_TD" th:text="#{pageLayout.leftRightTopDown}"></option>
+                      <option value="RL_TD" th:text="#{pageLayout.rightLeftTopDown}"></option>
+                      <option value="TD_LR" th:text="#{pageLayout.topDownLeftRight}"></option>
+                      <option value="TD_RL" th:text="#{pageLayout.topDownRightLeft}"></option>
+                    </select>
+                  </div>
+                  <div class="mb-3">
+                    <label for="orientation" th:text="#{pageLayout.orientation}"></label>
+                    <select class="form-control" id="orientation" name="orientation">
+                      <option value="PORTRAIT" th:text="#{pageLayout.portrait}"></option>
+                      <option value="LANDSCAPE" th:text="#{pageLayout.landscape}"></option>
+                    </select>
+                  </div>
+                  <div class="form-check mb-3">
+                    <input id="addBorder" name="addBorder" type="checkbox">
+                    <label for="addBorder" th:text="#{pageLayout.addBorder}"></label>
+                  </div>
                 </div>
                 <button type="submit" id="submitBtn" class="btn btn-primary" th:text="#{pageLayout.submit}"></button>
               </form>
+              
+              <script>
+                (function(){
+                  const modeCheckbox = document.getElementById('modeCustom');
+                  const defaultSection = document.getElementById('defaultSection');
+                  const customSection  = document.getElementById('customSection');
+                  const pagesPerSheet  = document.getElementById('pagesPerSheet');
+                  const rowsInput      = document.getElementById('rows');
+                  const colsInput      = document.getElementById('cols');
+
+                  function sync() {
+                    const mode = modeCheckbox.checked? 'CUSTOM' : 'DEFAULT';
+                    const isDefault = mode === 'DEFAULT';
+
+                    // Enable/disable relevant fields
+                    pagesPerSheet.disabled = !isDefault;
+                    rowsInput.disabled     =  isDefault;
+                    colsInput.disabled     =  isDefault;
+
+                    if (isDefault) {
+                      defaultSection.style.display = 'block';  // show Default
+                      customSection.style.display  = 'none';   // hide Custom
+                    } else {
+                      defaultSection.style.display = 'none';   // hide Default
+                      customSection.style.display  = 'block';  // show Custom
+                    }
+                  }
+
+                  modeCheckbox.addEventListener('change', sync);
+                  
+                  // Show/hide advanced settings
+                  const advancedToggle = document.getElementById('advancedSettingsToggle');
+                  const advancedSettings = document.getElementById('advancedSettings');
+
+                  if (advancedToggle && advancedSettings) {
+                    advancedToggle.addEventListener('change', function() {
+                      advancedSettings.style.display = this.checked ? 'block' : 'none';
+                      advancedSettings.querySelector('#addBorder').checked = false;
+                      advancedSettings.querySelector('#pageOrder').value = 'LR_TD';
+                      advancedSettings.querySelector('#orientation').value = 'PORTRAIT';
+                    });
+                  }
+                  // initial state
+                  sync();
+                })();
+              </script>
+              
             </div>
           </div>
         </div>