diff --git a/src/output/webbook.ts b/src/output/webbook.ts
index e2d27fe6..de50a5ec 100644
--- a/src/output/webbook.ts
+++ b/src/output/webbook.ts
@@ -522,7 +522,11 @@ export async function copyWebPublicationAssets({
   manifest.resources = [
     ...[manifest.resources || []].flat(),
     ...resources.flatMap((file) => {
-      if (preDefinedResources.includes(file)) {
+      if (
+        preDefinedResources.includes(file) ||
+        // Omit publication.json itself
+        pathEquals(file, upath.relative(outputDir, actualManifestPath))
+      ) {
         return [];
       }
       return file;
diff --git a/tests/__snapshots__/webbook.test.ts.snap b/tests/__snapshots__/webbook.test.ts.snap
index 72c62fdf..1acf7f23 100644
--- a/tests/__snapshots__/webbook.test.ts.snap
+++ b/tests/__snapshots__/webbook.test.ts.snap
@@ -248,9 +248,7 @@ Object {
       "url": "foo.html",
     },
   ],
-  "resources": Array [
-    "publication.json",
-  ],
+  "resources": Array [],
   "type": "Book",
 }
 `;
@@ -349,7 +347,6 @@ Object {
       "rel": "cover",
       "url": "cover.png",
     },
-    "publication.json",
     "style%20sheet.css",
     "themes/packages/mytheme/%25style%25.css",
   ],