BradyGames' Dead Island Official Strategy Guide includes the following:

AN ISLAND OF BEAUTY. A WORLD IN CHAOS.

Complete Walkthrough - Extensive strategy and tips for the entire story, presented in an easy-to-follow objective based progression, including every quest highlighted by Act.
Survivors -Each character is broken down into strengths and weaknesses, with all-inclusive skill guide and multiplayer tips.
Undead Horde -It's time to hit back; every enemy and zombie uncovered. Bring to them your knowledge and a bigger stick.
Crafting Guide -Comprehensive list of every crafting component and weapon modification in the game, including locations for every workbench.
Collectibles -Maps of each area show every collectible item.