Fumi has news of new G-Shock book that's been published in Japan. It's titled "The Book of G-Shock". This book looks to be similar to the G-Shock Bibles that have come out in previous years. Almost all the text is in Japanese, but there's lots of photos for everyone. It won't be released outside of Japan, but you should be able to pick one up on eBay or through other resellers.

Link (translated)

The Book of G-Shock