I disagree. SICP uses Scheme, which is not a purely functional language. Furthermore, the book doesn't contain that much voodoo, certainly not enough to qualify

I disagree. SICP uses Scheme, which is not a purely functional language. Furthermore, the book doesn't contain that much voodoo, certainly not enough to qualify as a freezing shower. If you want to learn how to deal with the awkward situations that arise from using a purely functional language, I'd recommend hanging out with the Haskell guys. SICP is legendary, but for a different reason. Lisp is useful for its simplicity and elegance. Modeling an imperative procedure in the timeless way that Clojure calls for is not necessarily pretty.