Often I’ll buy a record in a charity shop if it has a nice – or bizarre – cover. Though you shouldn’t judge a book by its (usually bad) cover, perhaps one should judge a record by its cover if it’s a good’un. All the above, none of which I’d heard of, turned out to be great.

Clockwise from top left: Fargo, I See it Now (1969): religious pop psych from Salt Lake City, Utah; The Butterfield Blues Band, The Resurrection of Pigboy Crabshaw (1967); Sharks, Jab It in Yore Eye (1974) and the self-titled debut by Upp (1975), a British rock/jazz fusion band, featuring guitar by Jeff Beck, who also produced the record.