In this brilliantly entertaining and fully updated tribute to one of the highest peaks of rock music, Erik Davis explores the magic – whether dark or otherwise – that surrounds Led Zeppelin's fourth album.

Delving into the different layers of each song, he uncovers their deep and often mystical roots, leaving the reader to decide whether the four symbols are ultimately a mystical initiation or "just" an inspired rock album, played by four exceptional musicians who conquered the known world.

Erik Davis is a writer, scholar, and journalist who writes about rock, culture, and esotericism.