Limited vinyl LP pressing of Rainbow's 1981 studio album. Difficult to Cure is the fifth studio album by the British hard rock band. The album marked the further commercialization of the band's sound, with Ritchie Blackmore once describing at the time his like of the rock band, Foreigner. The album material was started with singer Graham Bonnet still in the band. American singer Joe Lynn Turner, formerly of Fandango was recruited and sang over already completed musical tracks.