World of Warcraft - Game Guide
This best guide through the epic fantasy of World of Warcraft, from your earliest quests to the glory that awaits you as a true champion of Azeroth.
http://us.battle.net/wow/en/game/What is World of Warcraft? Returning Player's GuideThe Characters of Warcraft The Story of WarcraftLatest UpdatesDungeons, Raids, and ScenariosFrom its undiscovered corners to its most prominent landmarks, the world of Warcraft is filled with mystery, peril, and, most of all, conflict. Cities teem with backstabbing mercenaries and greedy politicians, dark caverns hold ancient and terrible secrets, and warzones play host to generations-old clashes between armies. Few would dare explore these distant and dangerous places; fewer still would expect to return. You are one of those few.
http://us.battle.net/wow/en/zone/#expansion=4--
Ref:
http://us.battle.net/wow/en/zone/#expansion=4