SCIP should always be in the list as one of the best programming books ever written. Others are 'Simply Scheme: An introduction to computer science', simply scheme is an alternative to "How to design Programs", http://htdp.org/, both books are written for non-programmers but they provide a gentle introduction to many advanced topics covered in SCIP. I prefer "Simply Scheme". Another one is the "Little Schemer" http://www.amazon.com/The-Little-Schemer-4th-Edition/dp/0262....