Oscar-winning documentary maker Frederick Wiseman’s film, Ex Libris, is a three hour valentine to the New York Public Library system, examining in granular detail how the role of the library reflects the changing demands of the internet era. With only one in three New Yorkers having broadband at home, Ex Libris depicts how the modern library is not only an access point, but a hub of communities, a centre of information and a bastion of truth in the era of fake news. Wiseman is one of the great figures of U.S. documentary history, and it’s notable that he’s chosen this particular moment to reflect on the library system, and why it’s important. Even without a voice-over, the running time doesn’t feel punishing at all; in fact, Ex Libris skips by, with brief appearances from luminaries like Patti Smith, Elvis Costello and Richard Dawkins to light the way. But it’s Wiseman’s intent that makes Ex Libris so compelling; doubling down on the ordinary interactions that illuminate the lives of the New Yorkers seen here, Wiseman’s film is as important as his Titicut Follies and Hospital as portraits of how key American institutions function.