I'm no expert, but I thought I'd add that The Little Scheme is a most enjoyable way to get into Lisp. I don't think it's that important that you use DrScheme (

I'm no expert, but I thought I'd add that The Little Scheme is a most enjoyable way to get into Lisp. I don't think it's that important that you use DrScheme (I suppose that's what you mean with PLT Scheme). If you do, make sure the 'language' is set to standard Scheme, not some 'safe' subset. In The Little Schemer, you go from absolute zero all the way to using continuation passing style, motivating and deriving the Y Combinator, and writing a metacircular evaluator.