Formed in 1968, Jethro Tull are one of rock's most enduring bands. Their 1971 album Aqualung , with its provocative lyrical content and continuous music shifts, is Tull's most successful and most misunderstood record. Here, music professor and fan Allan Moore tackles the album on a track-by-track basis, looking at Ian Anderson's lyrics and studying the complex structures and arrangements of these classic songs.