diff --git a/output/cover.pdf b/output/cover.pdf
index 0d4eb79..8e0109b 100644
Binary files a/output/cover.pdf and b/output/cover.pdf differ
diff --git a/scripts/cover.js b/scripts/cover.js
index 0825597..22e2ba3 100644
--- a/scripts/cover.js
+++ b/scripts/cover.js
@@ -90,8 +90,9 @@ async function generate() {
     console.warn('Run `pnpm build` first for an accurate spine width.\n');
   }
 
-  // Compute dimensions
-  const spineWidth  = pageCount * SPINE_PER_PAGE;
+  // Amazon rounds odd page counts up to even before computing spine width
+  const effectivePageCount = pageCount % 2 === 0 ? pageCount : pageCount + 1;
+  const spineWidth  = effectivePageCount * SPINE_PER_PAGE;
   const totalWidth  = BLEED_IN + TRIM_W_IN + spineWidth + TRIM_W_IN + BLEED_IN;
   const totalHeight = BLEED_IN + TRIM_H_IN + BLEED_IN;