LISP Online Books
- Common Lisp: A Gentle Introduction to Symbolic Computation http://www-2.cs.cmu.edu/~dst/LispBook/index.html
- OnLisp http://www.paulgraham.com/onlisp.html
- Structure and Interpretation of Computer Programs http://mitpress.mit.edu/sicp/
- How to Design Programs http://www.htdp.org/
- CMUCL: a high-performance, free Common Lisp implementation http://www.cons.org/cmucl/