21, based on the book Bringing Down the House: The Inside Story of Six M.I.T. Students Who Took Vegas for Millions by Ben Mezrich, opens on Friday, March 28. Kevin Spacey and Laurence Fishburne star in the story about M.I.T. students who use math to beat Vegas casinos. The movie tie-in edition, called 21: Bringing Down the House: The Inside Story of Six M.I.T. Students Who Took Vegas for Millions, is now available in a mass market tie-in edition (Pocket Star, $7.99, 9781416561705/1416561706) and trade paper tie-in edition (Free Press, $15, 9781416564195/1416564195).