The minds had long ago come up with a proper name for it; they called it the Irreal, but they thought of it as Infinite Fun. That was what they really knew it as. The Land of Infinite Fun. –Iain M. Banks, Excession If you’ve spent any time at all on Irreal, you know that I consider Structure and Interpretation of Computer Programs (SICP) one of the best—arguably the best—books on computer science.