Cambridge University lays bare the secrets of its library tower

The tower at Cambridge University’s library was used to store books once deemed of no interest to academics.To avoid disappointment, an exhibition opening this week at the Cambridge University library should carry the warning sign: “These books contain no pornography”.Despite undergraduate folklore there is no secret stash of pornography among the 200,000 books in the 17 floors of the tower, which rises 157 feet above the library.