This was the first book I read about Common Lisp and it really made me excited about the language. The writing is engaging and the examples are first class. My only reservation would be Graham's comments about the loop macro, which put me off really trying to use and understand loop for some time. It was only by seeing examples of its use elsewhere (in particular, in code snippets posted to the comp.lang.lisp newsgroup) that made me re-evaluate the use of loop. It should be noted that Graham is not the only lisp programmer to have strong views about loop though.

In summary though - a great book. Just make your own mind up about loop.