My wife and I watched "Squaring the Circle (The Story of Hipgnosis)" on Netflix last night and really enjoyed it. Great behind the scenes look at the genesis/history of Hipgnosis and how so many iconic British LP covers were created. I always primarily associated them with the classic Pink Floyd covers and the film has excellent footage and live interviews with the surviving members of Pink Floyd and Led Zeppelin, Paul McCartney etc. They showed so many covers that I was familiar with but never knew were designed by them. Amazing body of artwork and creative out-of-the-box design. Highly recommended!
https://www.netflix.com/title/81721595
