alternate cover can be found here Want to write The Next Big Multiplayer Online Game? This series will help you to learn the ropes. Vol.I covers topics such as GDD and Communications.
The idea behind this book is to summarize the body of knowledge that already exists on multiplayer games but is not available in one single place. And quite a few of the issues discussed within this series, while known in the industry, have not been published at all (except for maybe in discussion forums).
Programming and deploying an MOG is a daunting task, and having a frame of reference is usually quite helpful — "hey, those guys have already tried this, and it worked for them."
I've never seen such a detailed, straightforward and comprehensive guide on games related networking (and not only networking).
All the info I've scratched peace-by-peace from the different conferences, papers and blog posts before - all in one book, well-explained, with proofs and references to corresponding papers.