Being a pop star and having a dozen girls waiting outside your front door is a frequent musician's fantasy. However, if they're actually waiting for your more-famous housemate, who happens to be Paul McCartney, it can wreak havoc on the ego. Such was Peter Asher's experience when McCartney dated Asher's sister Jane, one of the many minor yet significant episodes explored in PAUL MCCARTNEY: MANY YEARS FROM NOW, Barry Miles's intimately detailed biography of the ex-Beatle. Miles packs in an abundance of early-years background information, from McCartney's Liverpool childhood to the Beatles' apprenticeship in Hamburg's red-light district, but really hits paydirt with his account of London's '60s art scene, in which the author was a major participant, and of McCartney's involvement with avant-garde icons such as William Burroughs and British electronic music experimenter Cornelius Cardew. McCartney's relaxed recollections-he's a beguiling storyteller-compiled over a five-year period of conversations with the author, are illuminating, particularly on the subjects of songwriting ("Eleanor Rigby" was written with a view to a post-Beatle career, once McCartney had hit 30), and his artistic rivalry, later to develop into full-blown animosity, with John Lennon.