Clockwise, from top: Peter Asher (right) with Mick Jagger, circa 1960s. Asher next week is launching, “Peter Asher: A Musical Memoir of the ’60s and Beyond.” The Sixities British pop duo: Peter and Gordon. After Asher and Gordon Waller split, Asher went on to producing. From left: John Lennon, George Harrison, Peter Asher and George Martin. Asher’s sister was dating Paul McCartney, who would sometimes give Asher unrecorded Lennon-McCartney songs, including their eventual smash hit “A World Without Love.” Peter Asher at the console in the studio with James Taylor, circa 1971. Asher produced Taylor’s eponymous debut album, before returning with Taylor to the U.S. and producing the 1970 album “Sweet Baby James.” Peter Asher, left, with James Taylor and singer Danny “Kootch” Kortchmar.