diff --git a/app/Entities/ExportService.php b/app/Entities/ExportService.php
index 1b294d8b1..b0e88b18b 100644
--- a/app/Entities/ExportService.php
+++ b/app/Entities/ExportService.php
@@ -8,6 +8,7 @@ use Exception;
 use SnappyPDF;
 use League\HTMLToMarkdown\HtmlConverter;
 use Throwable;
+use ZipArchive;
 
 class ExportService
 {
@@ -271,4 +272,27 @@ class ExportService
         }
         return $text;
     }
+
+    /**
+     * Convert a book into a zip file.
+     */
+    public function bookToZip(Book $book): string
+    {
+        // TODO: Is not unlinking the file a security risk?
+        $z = new ZipArchive();
+        $z->open("book.zip", \ZipArchive::CREATE | \ZipArchive::OVERWRITE);
+        $bookTree = (new BookContents($book))->getTree(false, true);
+        foreach ($bookTree as $bookChild) {
+            if ($bookChild->isA('chapter')) {
+                $z->addEmptyDir($bookChild->name);
+                foreach ($bookChild->pages as $page) {
+                    $filename = $bookChild->name . "/" . $page->name . ".md";
+                    $z->addFromString($filename, $this->pageToMarkdown($page));
+                }
+            } else {
+                $z->addFromString($bookChild->name . ".md", $this->pageToMarkdown($bookChild));
+            }
+        }
+        return "book.zip";
+    }
 }
diff --git a/app/Http/Controllers/BookExportController.php b/app/Http/Controllers/BookExportController.php
index 0414b7250..a92d94cc9 100644
--- a/app/Http/Controllers/BookExportController.php
+++ b/app/Http/Controllers/BookExportController.php
@@ -6,7 +6,6 @@ use BookStack\Entities\Managers\BookContents;
 use BookStack\Entities\ExportService;
 use BookStack\Entities\Repos\BookRepo;
 use Throwable;
-use ZipArchive;
 
 class BookExportController extends Controller
 {
@@ -72,20 +71,7 @@ class BookExportController extends Controller
     public function zip(string $bookSlug)
     {
         $book = $this->bookRepo->getBySlug($bookSlug);
-        $z = new ZipArchive();
-        $z->open("book.zip", \ZipArchive::CREATE | \ZipArchive::OVERWRITE);
-        $bookTree = (new BookContents($book))->getTree(false, true);
-        foreach ($bookTree as $bookChild) {
-            if ($bookChild->isA('chapter')) {
-                $z->addEmptyDir($bookChild->name);
-                foreach ($bookChild->pages as $page) {
-                    $z->addFromString($bookChild->name . "/" . $page->name . ".md", $this->exportService->pageToMarkdown($page));
-                }
-            } else {
-                $z->addFromString($bookChild->name . ".md", $this->exportService->pageToMarkdown($bookChild));
-            }
-        }
-        return response()->download('book.zip');
-        // TODO: Is not unlinking it a security issue?
+        $filename = $this->exportService->bookToZip($book);
+        return response()->download($filename);
     }
 }