I don't think I ever really understood call/cc until I read Lisp in Small Pieces. The author makes a great effort to implement call/cc in each of the interprete

I don't think I ever really understood call/cc until I read Lisp in Small Pieces. The author makes a great effort to implement call/cc in each of the interpreters and compilers he presents, and examines the hairy issues that come up when you decide to support first-class continuations. Highly recommended.