Kiefer Sutherland was only allowed to bring two books for his 48-day stay in jail – but he's getting plenty of other reading material. "The guy's been getting a ton of fan mail," says officer John Balian, spokesman for the Glendale City Jail. "Easily more than 100 letters a day." So far, the 24 star has only had one visitor: his lawyer. Sutherland, 40, is serving time for his second DUI conviction and for violating probation. The actor will be spending his birthday, Christmas and New Year's behind bars.