More On My Bookshelf
Paradigms of Artificial Intelligence Programming: Case Studies in Common Lisp. Peter Norvig (1992, Morgan Kaufman). Excellent book on AI with well written lisp code.
Object-Oriented Programming in Common Lisp, A Programmer's Guide to CLOS. Sonya E. Keene (1989, Symbolics).
The Art of the Metaobject Protocol. Kiczales et. al. (1991, MIT). Advanced book on concepts of object-oriented programming in Common Lisp. Excellent, but don't bother until you have a year or two of experience.