Mario Testino has released his largest book to date, titled SIR, featuring more than 300 images taken by the renowned photographer in his search to define the “allure of men.”

“The way men are seen in photography, in fashion, and the way that men look at pictures of themselves has changed in recent years,” says Testino in the press release. “It is a subject that has come into focus: The masculine image, a man’s personal style, changing attitudes to the male face and body.”

Photographs include studies of Brad Pitt, George Clooney, Jude Law and Colin Firth, David Beckham, David Bowie, Mick Jagger, Keith Richards and more.

Head over to TASCHEN to get your hands on a copy.

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