My professor used this for my Advanced Programming Languages class at school. The book is good, but I found some of those first few chapters could have used some more examples.
Well... Scheme, actually. The author is one of the PLT Scheme developers. The PLT DrScheme environment has features built in expressly for running the code in this book.
I also have SICP on my reading list so I just thought this would make a great follow up to that text since by then I would have a good grasp of scheme and functional programming.