Create Your Own Programming Language 13 years ago
The book has tons of code listings that make up the majority of the pages.
It used to be 53 pages, but is now somewhere over 100 pages, according the new updated site. The original's code listings are in Ruby; I can't help but wonder if he just redid them in Java to make the book longer. Seriously. And no, I'm not picking on Java.
Here's the old version: