Ken Jennings's Trivia Almanac is the ingeniously organized book where, for a change, the all-time Jeopardy champ gets to ask the questions-and where every day of the year will give you the chance to test your trivia mettle.

For example-February 21: In 1912, on this day, Teddy Roosevelt coined the political phrase hat in the ring, so Ken Jennings fires off a series of ring questions. What two NFL quarterbacks have four Super Bowl rings each?* What rings are divided by the Cassini Division?** Also on this date, in 1981, the goth music scene was born in London, so here's a quiz on black-clad icons like Darth Vader, Johnny Cash, and Zorro. Do you know the secret identities of Ivanhoe's Black Knight*** or Men in Black's Agent M****?

In this ultimate book for trivia buffs and other assorted know-it-alls, the 365 entries feature This Day in History factoids, trivia quizzes, and questions categorized by Jennings as Easy, Hard, and Yeah, Good Luck. Topics cover every subject under the sun, from paleontology to mixology, sports feats to Bach suites, medieval popes to daytime soaps. This addictive gathering of facts, oddities, devilishly clever quizzes, and other flights of fancy will make each day a fun and intriguing new challenge.