Mozart Reina has a post up about his Lisp bookshelf. It’s a nice collection of books that anyone wanting to master Lisp should read. My favorite, SICP, is there as is Lisp in Small Pieces a book I very much want to read but not at $106.
If you’re looking for some books on Lisp, this is a good, representative list. Many are available for free on the Web so even if you’re a starving student or otherwise short of funds, you can get an excellent start on the road to Lisp. It’s a journey well worth taking.