Math rock sounds like blueprints look: exact, precise, architectural. This trance-like progressive metal music with indie rock and jazz influences has been captivating and challenging listeners for decades. Bands associated with the genre include King Crimson, Black Flag, Don Caballero, Slint, American Football, Toe, Elephant Gym, Covet, and thousands more. In an online age of bedroom producers and sampled beats and loops, math rock is music that is absolutely and resolutely played: men and woman in rooms with instruments creating chaos, beauty, and beautiful chaos. This is the first book-length look at the global phenomenon. Containing interviews with prominent musicians, producers, and critics spanning the globe, Math Rock will delight longtime fans while also serving as a primer for those who want to delve deeper. It shows why and how an intellectually complex, largely faceless, and almost entirely instrumental form of music has been capturing the attention of listeners for 50 years—and counting.