Ebook: Thinking Forth

If you program in Forth, this book is mind-opening. I second the reviewer who said you should read this book after reading "Starting Forth".

However, to the reviews along the lines of "You don't use Forth? Doesn't matter": I think this book would be very hard going for someone not familiar with Forth. In fact, it is a bit dated, and there are better, more modern books available on non-Forth design, factoring, etc.

Also note that the copyright holder has made this edition of the book (2004) freely available online. Buying from Amazon saves you from getting square eyes (or using up all your print toner).