They say there are no second acts in American lives, and third acts are almost unheard of. That's part of what makes Brian Wilson's story so astonishing. As a cofounding member of the Beach Boys in the 1960s, Wilson created some of the most groundbreaking and timeless popular music ever recorded. With intricate harmonies, symphonic structures, and wide-eyed lyrics that explored life's most transcendent joys and deepest sorrows, songs...