The Casio G-Shock Hacker's Handbook is an interesting project. In this book you will find 'hacks' that can be done on a Casio G-Shock. Hacks covers how to stealth a G-Shock, dyeing and ruggedizing among others.
The book appears in PDF format and free to download. However, when the book is ready for publication, it will be publish under a Creative Commons Licence.