Raph Koster,the veteran game designer and former SOE chief creative officer,has announced(according to gamasutra.com) via his weblog that he is working on a follow-up "A Grammar of Gameplay: How Things Work" book(originally as A Theory of Fun for Game Design).This book was created by "Using the latest thinking from game stuies as well as years of experience".

The book is broken into a few broad sections,including

• A brief recap of A Theory of Fun, to provide context for the rest of the book.
• An overall structure for looking at games: separating game mechanics from content, the game metaphor from the mechanics, and the narrative from the metaphor.
• A breakdown of the �grammar� of games: how the mechanics fit together naturally to form a sort of �atomic theory of game design.�
• The borrowed media: games today are a multimedia experience. The mechanics alone are not the only part of the experience. Using research and knowledge from a variety of fields, we explore the best practices and the cognitive impacts of things like camera choice, art style, and music.

Plus,it is also revealed that this new book was supposed to be done by the fall,but not production date was confirmed.For more details on this book,you can head here.