This book is probably the most comprehensive anthology of video game related studies that I have to date. More to the point, it doesn't just have a lot of essays, but it has a lot of essays that are foundational to the field, and still significant five years later. To name a few, we have play theory from Huizinga, Callois, Bateson and Sutton-Smith; education and game discussions from James Paul Gee and Henry Jenkins; game design essays from actual game designers, including Marc LeBlanc, Doug Church, and Chris Crawford; and a good dose of MMO essays, including Richard Bartle, Raph Koster, and Edward Castronova. I'd especially like to note that Zimmerman and Salen included a few essays from those outside of "academic" circles, including two game journalists (Tom Chick, always_black) and even an FAQ writer--it's really nice to see acknowledgement that people who write informatively on games don't always have a bunch of letters next to their names. The downside of the book is that if you don't subscribe to the editors' principle that there's a fairly smooth continuity between traditional game and play and video games, many of the essays aren't worth your time. And at nearly 900 pages, there's almost too much here to process it all. But as a reference book and a summation of the field, it's top notch.