Deathwing's return resulted in massive changes to the world of Azeroth.  The Cataclysm reshaped the lands, resulting in new challenges to any adventurer brave enough to face them.  The Official Strategy Guide for World of Warcraft®: Cataclysm prepares you for all the changes and threats which await you and your friends.

• Massive Class Updates: You get tips for gearing up your level 85 characters for heroic dungeons, and tactics you can apply to playing solo or running with a group.
• New Allies. New Experiences: Two new races, the Goblins and the Worgen, join the fray but even the oldest races have updated racial abilities and all-new starting zone experiences.
• The New Azeroth: The changes wrought by the Cataclysm opened new regions and changed many older ones.  You won't get lost with this guide!  It includes maps for every zone of the Eastern Kingdoms, Kalimdor, and the Maelstrom.
• An Introduction for New Players: This easy-to-follow section covers the basic concepts and controls of World of Warcraft.  Even if you've never tried an online game before, you won't feel overwhelmed during your first visit into this new world. 

If you're looking to join the thousands of people already playing World of Warcraft, or get caught up with all the changes to the game, this is the book you need!