Game Programming Gems 5 is taking submissions...http://gameprogramminggems.com/schedule.html
As one of the authors for GPG4, I recommend having a go to all the experienced and/or skilled games developers here if you have a gem you think would take 5-10 pages to describe concisely.
"The purpose of writing a Game Programming Gem is to share your knowledge and experience by providing a practical solution to an interesting problem. As a writer, your goal is to present your solution in a clear, concise style that is enjoyable to read. The goal of the editors is to group the Gems into well-organized sections with a clear flow and message."