The "Left 4 Dead 2 : Prima Official Game Guide" by Prima Games Staff and David Hodgson is a comprehensive guide to the popular video game. Published by Random House Information Group in 2009, this trade paperback book features 240 pages filled with tips, strategies, and illustrations to help players navigate through the game. With a focus on the game's genre and topic, this official game guide is a valuable resource for fans looking to master the challenges of Left 4 Dead 2.