Philip Glass: Solo Piano (Philip Glass, CBS Masterworks 1989)

Recorded by Glass himself, this 1989 album centres on the five-part Metamorphosis, some of which he first wrote for Errol Morris's documentary The Thin Blue Line, along with Mad Rush. Left-hand patterns roll steadily while right-hand figures shift through small variations, producing brooding, contemplative intimacy. Choose it to hear Glass's minimalism at its most personal.