HUNTINGTON BEACH, CA - OCTOBER 19: Guitarist Phil Collen signs copies of his book 'Adrenalized: Life, Def Leppard, And Beyond' at Barnes & Noble on October 19, 2015 in Huntington Beach, California. (Photo by Jerod Harris/Getty Images)
HUNTINGTON BEACH, CA - OCTOBER 19: Guitarist Phil Collen signs copies of his book 'Adrenalized: Life, Def Leppard, And Beyond' at Barnes & Noble on October 19, 2015 in Huntington Beach, California. (Photo by Jerod Harris/Getty Images)