Thanks for this wonderfull book! I have just bought the printed book with the pdf. Very very good!

This might be just the perfect companion to "Pratical Common Lisp" by Peter Seibel. I always thought PCL is an excellent book for someone who already knows some Lisp. With these two books, I believe you really achieve a powerfull combo to start learning and using Lisp!

And the music is very cool too :-)