Imagine being a rock fan in October 1969. You've got 30 shillings in your pocket, and your local record emporium has several new releases in stock. Albums out that month included Led Zeppelin's second, Frank Zappa's Hot Rats, Willy And The Poor Boys by Creedence Clearwater Revival, and the debut album by Free.
Then, in the 'K' section, you spot something terrifying. There's no band name on the cover, just a haunted, screaming face.
