According to rollingstone.com, Nick Mason is writing a book about his band, Pink Floyd:
While fans will continue to wait and wonder about the group's future activities, they can find solace in a new book about the band penned by Mason himself, Pink Floyd's only continuous member since 1965. Inside Out: A Personal History of Pink Floyd (Chronicle Books), due out in May, documents the famous moments in the psychedelic rock legends' forty-year musical odyssey: the rise and descent into madness of former singer Syd Barrett; the making of the blockbuster Dark Side of the Moon album; the mammoth Wall tour; and bassist and chief songwriter Roger Waters' acrimonious departure. It also contains little known stories such as the group's appearance on an American TV show hosted by Pat Boone in 1967; Jimi Hendrix offering the then-struggling band free use of his Electric Lady studios; Floyd's visual designer Storm Thorgerson being grilled by a record executive for putting an image of a cow on Atom Heart Mother ("Do you want to destroy this record company?"); and Pink Floyd's collaboration with a ballet company in the early Seventies.
...Unlike the previous books about the band, Mason's account takes on a more personal and light-hearted approach. "I wanted to tell the story in a slightly different way," he says. "It's hopefully a rather funny book about a serious band." He didn't want to turn the book into a sordid tell-all, and he offers these reasons: "You have to remember the three guys are still my friends, and they've all got families. Most of them are bigger than I am, and they have better lawyers."
I'm guessing the list of reasons is not in order of importance.