I learned with Paul Graham's book, ANSI Common Lisp. Still have it somewhere. I also printed out and bound a copy of On Lisp, since it was out of print and he

I learned with Paul Graham's book, ANSI Common Lisp. Still have it somewhere. I also printed out and bound a copy of On Lisp, since it was out of print and he said to just download it. It's better in print because then you don't need to swap between two apps on the same screen. Plus then you actually type out the code, which is a great exercise.