A fantastic language introduction for beginners and fascinating artifact in its own right.
The writing is friendly and conversational. The illustrations help make it memorable.
The book takes you from the simplest concepts to the hardcore metaprogramming internals
of Forth itself. I don't think you could ask for more than this from an introductory
programming book.

I'm currently reading the "sequel", Thinking Forth, and I'm enjoying it. Review to come.