diff --git a/docs/book/theme/index.hbs b/docs/book/theme/index.hbs
index e0fd8cd68a0..d0dbd8bd551 100644
--- a/docs/book/theme/index.hbs
+++ b/docs/book/theme/index.hbs
@@ -132,7 +132,8 @@
                             <i class="fa fa-book"></i>
                             </button>
                             <div class="version-dropdown-content">
-                                <a href="https://book.kubebuilder.io/"target="_blank" rel="noopener noreferrer">v3-book</a>
+                                <a href="https://book.kubebuilder.io/"target="_blank" rel="noopener noreferrer">latest (V4x)</a>
+                                <a href="https://book-v3.book.kubebuilder.io/"target="_blank" rel="noopener noreferrer">v3-book</a>
                                 <a href="https://book-v2.book.kubebuilder.io/"target="_blank" rel="noopener noreferrer">v2-book</a>
                                 <a href="https://book-v1.book.kubebuilder.io/"target="_blank" rel="noopener noreferrer">v1-book</a>
                             </div>