“I just ordered all six seasons,” says librarian Milton, a Defense Department contractor who gives only his first name to visiting journalists.

He offered no explanation for the sudden popularity of the half-hour sit-com about an inner-city Philadelphia kid who moves in with his affluent cousins in California beyond the observation that comedy is widely popular among requested items from the detention center’s 28,000 book and video library.

Overall, he said, there’s been a slowdown in circulation as many of the captives passing their 11th Ramadan in detention engage in other pursuits — praying, eating and talking together between dusk and dawn in their communal areas. But even before this holy month, demand for J.K. Rowling’s Harry Potter series had dwindled.