Having just read ANSI Common Lisp, I have to say it is a truly excellent book. It's not that it just teaches you Lisp well, it also enthuses you with why Lisp is an enjoyable language to program in.

While I can think of several books that have managed this with Perl, comparatively few covering other languages seem to be suffused with the authors love of the language. The only other example that immediately springs to mind is Peter Van Der Linden's Expert C Programming - Deep C Secrets.