Followers: 1.5 million
Sample tweet: "Good night universe. Good night wife who thinks I am Satan because I follow 666 people. Good night #MyNightInHaiku writers. Dream sweetly."
With more than 1.5 million followers, Neil Gaiman is the most popular novelist on Twitter, and while you can credit the fanboys for making this author of the comic-book series The Sandman and fantasy best sellers like Stardust and American Gods popular, it's his everyguy tweets that keep followers around. Gaiman corresponds enthusiastically with his fans and friends and keeps users up to date on his travels (most recently, to China and the U.K.) and his writing, including his little-known book: a biography of Duran Duran.