Inside Out: A Personal History of Pink Floyd is Nick Mason's personal memoir of Pink Floyd. The book marks the first time that a group member has written a recollection of his experiences of life in the band. Mason – the only member of the band to have been a part of it in all incarnations and line-ups – covers Floyd's entire career, from the initial coming together and the Syd Barrett–led psychedelic era of the late 1960s through their success in the 1970s to the present day, via the acrimonious splits of the 1980s.