Mostly books. Old school ;-)

Toureztky's Common Lisp A Gentle Intro to Symbolic Programming Norvig's PAIP Seibel's Practical Common Lisp Graham's ANSI Common Lisp

I'd like to snag a copy of Sonya Keene's book on CLOS but hesitant to drop $50+ for a used book.

oh man you remind me I have a copy of PAIP I never fully worked through...

Also Lisp in Small Pieces (I went through a helluva lisp phase a long time ago but never got as deep as I should have).