Revolver (Beatles album) group collective since 1962, and gave them an unprecedented amount of time to prepare for a new album. Writing in "The Beatles Forever", Nicholas Schaffner cites 1966 as the start of the band's "'psychedelic' period" and adds: "That adjective implies not only the influence of certain mind-altering chemicals, but also the freewheeling spectrum of wide-ranging colors that their new music seemed to evoke." Music journalist Carol Clerk describes "Revolver" as having been "decisively informed by acid", following John Lennon and George Harrison's continued experimentation with the drug LSD since the spring of 1965.<ref name="Clerk/Uncut"> Available at Rock's Backpages (subscription required).</ref>
A Collection of Beatles Oldies compilations: the band's "1962–1966" greatest hits set, released in 1973, contained fifteen of the songs; the remaining track, "Bad Boy", was then included on the 1976 compilation "Rock 'n' Roll Music". "A Collection of Beatles Oldies" was deleted from the Beatles' catalogue following the reissue of their albums on compact disc in 1987. All songs written by John Lennon and Paul McCartney except where noted. A Collection of Beatles Oldies A Collection of Beatles Oldies (subtitled But Goldies!) is a compilation album by the English rock band the Beatles. Released in the United Kingdom in December 1966, it features hit