In Rainbows is one in a series of artistic triumphs Radiohead achieved between 2000 and 2009, their last album of the decade and the one that plunges furthest into the deep, dark electronica-inflected territory they dove into headfirst ten years before. The sound of In Rainbows is the sound of "anonymous fear" according to frontman Thom Yorke– of 21st century dread and anxiety par excellence scored with spooky electro-pop instrumentation. You can hear it on hair-raising tracks like "Bodysnatchers" or listless melancholic ballads like "Weird Fishes/Arpeggi," all of which incorporate breathtaking new avant-garde influences into Radiohead's classic alt-rock sound.

First listen: