Definitely this book. I would recommend keeping Graham's books for later. Practical Common Lisp + Land of Lisp + Common Lisp recipes + the Lisp Hyperspec = Pr

Definitely this book. I would recommend keeping Graham's books for later. Practical Common Lisp + Land of Lisp + Common Lisp recipes + the Lisp Hyperspec = Profit! Additional readings: Successful Lisp (Lamkins - very underrated), Paul Graham's books, and Hoyte's Let Over Lambda (advanced).