URIAH HEEP switched record labels in North America in 1973. Following the release of Live… January 1973, the band left Mercury Records and were signed to the bigger Warner Brothers label, who had Deep Purple, Black Sabbath, Alice Cooper, and various other hard rock acts.
In 1974, Mercury Canada issued a ‘Best of Uriah Heep‘ in time for the spring, followed by a ‘Best of Volume 2′ in December. Both featuring kinda cheap black covers, but with liner notes on the back. All tracks from both albums (obviously) come from the first 5 Heep records. The first ‘Best of’ is very easily found here, as it’s been reissued a number of times, but ‘Volume 2’ is a bit more rare (especially in good condition) as it was only issued once (on LP & 8-track).

In 1976 Mercury US released the ‘Best of Uriah Heep‘ there. It featured a totally different cover And tracklisting. It also featured a timeline of band members, and lengthy liner notes on the back cover.