Take it from King Crimson superfan Adam Jones of Tool: In the Court of the Crimson King is an essential listen. The English bands 1969 debut is a five-song, 43-minute journey through psych-rock, jazz, folk, classical music and more a sidewinding, mind-opening musical experience that makes Pink Floyds Dark Side of the Moon sound sober by comparison. On top of all that, it has one of the best album covers in rock history, making it a vinyl must-have.