The male librarian is not as rare a specimen as you might think. In fact, there are enough of them to fill out every month of the year. With the 2012 Men of the Stacks, which is sort of the book world’s answer to sexy firemen calendars, we get photos of a diverse group of men — who also happen to be librarians — in their natural habitats, which isn’t always the library! My favorites are Mr. January (in a pose that’s very, very mildly NSFW), Mr. September, and Mr. December, who’s pictured on the right. Who’s your favorite sexy shusher?