Deep Purple's fourth studio album overall, but the first to feature the seminal Mark II lineup. Original vocalist Rod Evans and original bassist Nick Simper were fired from the band and replaced by Ian Gillan and Roger Glover, both from Episode Six. Guitarist Ritchie Blackmore then took point with regards to the band's creative direction from keyboardist Jon Lord, and thus what was recorded would in ways herald the birth of Heavy Metal. The band did not forget their progressive roots however, and thus long solos by both Blackmore and Lord or a series of shorter but alternating solos dominate the record.
"Deep Purple In Trope":