diff --git a/templates/reader.html b/templates/reader.html
index c012edc..ff57539 100644
--- a/templates/reader.html
+++ b/templates/reader.html
@@ -149,6 +149,27 @@
                 console.log("Could not find index for", filename);
             }
         }
+
+        // Keyboard navigation: arrow keys for previous/next chapter
+        document.addEventListener('keydown', function(e) {
+            // Only handle arrow keys when not typing in an input/textarea
+            const isTyping = e.target.tagName === 'INPUT' || e.target.tagName === 'TEXTAREA' || e.target.isContentEditable;
+            if (isTyping) return;
+
+            {% if prev_idx is not none %}
+            if (e.key === 'ArrowLeft') {
+                e.preventDefault();
+                window.location.href = "/read/{{ book_id }}/{{ prev_idx }}";
+            }
+            {% endif %}
+
+            {% if next_idx is not none %}
+            if (e.key === 'ArrowRight') {
+                e.preventDefault();
+                window.location.href = "/read/{{ book_id }}/{{ next_idx }}";
+            }
+            {% endif %}
+        });
     </script>
 </body>
 </html>