Warren Zevon created a howling hit with a little help from his friends, John McVie and Mick Fleetwood from Fleetwood Mac. Included on Zevon’s album, “Excitable Boy,” “Werewolves Of London” hit the Billboard charts in April of 1978. The 45 on Asylum Records is worth no more than $10.00 but the picture disc version, released by Elektra Records, is worth up to $100.00 today.