The greatest sequel since The Godfather: Part II. Amnesiac was the second half of the one-two punch Radiohead began with 2000's Kid A. It was smoother on the surface yet just as disorienting underneath, delivering the rock guitars that its predecessor held back, but in all kinds of warped and mutated forms: "Knives Out" soared like vintage Smiths, and "I Might Be Wrong" rode an Allman Brothers riff into the trip-hop hinterlands. The piano nightmare "Pyramid Song" remains terrifying, even if nobody has ever figured out what the hell Thom Yorke is saying — probably not even Thom Yorke.
• Rolling Stone's Original 2001 Review