I picked up this book a short while ago for two reasons:
1) I wanted to 'learn the language of my editor' (emacs)
2) to learn a bit of functional programming style/way of thinking
I am about half-way through and loving every minute of it.
I am having the same experience. I even bought a copy of this book for my cousin who is interested in programming... although I'm afraid the mathematical concepts involved in lisp and other functional languages might mess up his mathematical development for a few years (at least until he gets into high school)
I am about half-way through and loving every minute of it.