diff --git a/chapter2.lisp b/chapter2.lisp
index d9a6980..f39c12a 100644
--- a/chapter2.lisp
+++ b/chapter2.lisp
@@ -123,3 +123,9 @@ and upper bound."
   (if (null (cdr l))
       l
       (last-pair (cdr l))))
+
+;; Exercise 2.18
+(defun reverse-user (l)
+  (if (null l)
+      ()
+      (append (reverse-user (cdr l)) (list (car l)))))