At more than 100 million user accounts created and over $10 billion made, it is not only the most-subscribed MMORPG in the world, but the highest-grossing video game of all time. Ten years after its launch, Blizzard Entertainment's World of Warcraft is less a game and more a world unto itself, and it's a world Daniel Lisi knows well. More time in his high school years was spent in Azeroth than in his hometown of Irvine, CA—a home he happened to share with Blizzard itself. Now that Lisi has founded his own game development studio, WoW remains his most powerful example of just how immersive and consuming a game can be. Based on research, interviews, and the author's own experience in a hardcore raiding guild, Lisi's book examines WoW's origins, the addictive power of its gameplay loop, the romances WoW has both cemented and shattered, the enabling power of anonymity, and the thrill of conquering BlizzCon with guildmates you've known for years and just met for the first time.