Freed from the constraints of songwriting and recording with The Beatles, John Lennon's creativity flourished from 1968-1975 and after a five year break he was embarking on a new, mellower phase when he was tragically shot to death in NYC. This discography of Lennon's solo recordings and those with Yoko Ono sets down the recording a complete collector would need.
The discography covering Brummie heavy rock band Black Sabbath and founder members, Geezer Butler, Tony Iommi, and Bill Ward and outlining the recordings of Ozzy Osbourne who has however a sufficiently vast solo output to merit a separate discography coming shortly.