Ken Jennings is an American author and game show contestant who is best known for his record-breaking 74-game winning streak on the U.S. television quiz show Jeopardy!. He is also a self-proclaimed 'BRAINIAC' and has written several books, including BRAINIAC: Adventures in the Curious, Competitive, Compulsive World of Trivia Buffs. Jennings is also the author of the Jennings series of books, which includes BRAINIAC Author Jennings.