Practical Common Lisp

I have now had the opportunity to peruse the online pages of Peter Seibel's excellent work, Practical Common Lisp. I'm not quite finished yet, but it's been absolutely perfect for filling in the gaps in my knowledge recently lamented. I recommend it as strongly as I am able to anyone wanting to learn more about Lisp- and I'm not usually one to enjoy or recommend books on technical topics. I may even take the unusual step of buying the dead-tree edition. Thanks, Mr. Seibel.