Loving Lisp, or the Savvy Programmer's Secret Weapon
by Mark Watson
While I consider Java to be twice as "programmer efficient" as C++, I consider Common Lisp to be twice as good as Java for some applications. Common Lisp compilers are freely available, stable, and compiled Common Lisp code is very fast. Not yet programming in Lisp? Spend a few evenings with this free web book and experience what many computer scientists consider the best all-around programming language.
Download or read it online for free here:
by Robert J. Chassell - Free Software Foundation, Inc.
This is an introduction to programming in Emacs Lisp for people who are not programmers. The text is designed to get you started: to guide you in learning the fundamentals of programming, and to show you how you can teach yourself to go further.
by E.C. Berkeley, D.G. Bobrow - The MIT Press
LISP is a remarkable and powerful language, because not only does it govern the operation of a computer, but also it is a mathematical language of great power for processing processes in mathematics, logic, and symbol manipulation in general.
by Doug Hoyte - Lulu.com
One of the most hardcore computer programming books out there. Starting with the fundamentals, it describes the most advanced features of the most advanced language: Common Lisp. This book is about macros, that is programs that write programs.
by Bert Burgemeister
Common Lisp Quick Reference is a free booklet with short descriptions of the thousand or so symbols defined in the ANSI standard. Its purpose is to give a quick overview on things they know already, or some clue on what to look up elsewhere.