Daisley provided significant contributions to the album’s songwriting, having written some of the music and most of the lyrics. Kerslake claims to have also had a hand in the writing of the album, even performing lead vocals on some of the original demo recordings. “‘Flying High Again’ was one of my ideas, ‘Over the Mountain’ was another. The basic (demo) tracks were just Bob’s words, my vocals—though some of the words I wrote—and Randy’s playing. It was unreal. And then we got Don Airey to come in and do the keyboards”, he stated in 2009. Kerslake says he used a piano in the studio to write many of the songs with guitarist Randy Rhoads. Daisley and Kerslake were not given credit for their performance or songwriting contributions, a situation which resulted in a later lawsuit.