On Lisp, Advanced Techniques for Common LISP

:) No matter what your experience level (and I had been a professional Lisp hacker for over ten years when I first read this book), there is something to learn from On Lisp. Read it, and improve your ability to conceptualize solutions to your programming problems.

:) I personally don't code in Lisp, and if I did, I sure wouldn't do it in Common Lisp, the dialect this book concentrates on. However, this book what I was looking for -- interesting reading about some advanced programming concepts that happen to be demonstrated in Lisp.