In the thirtieth year of his reign, Arka-Dal, Emperor of Thule, and his allies face the darkest threat in human history when the demons from the Abyss try to invade the Earth. To stop them, they must enter the very heart of the Abyss and read an ancient incantation while standing at the sacred altar of the Elder Gods. But the incantation is secreted within the rotting pages of an eons-old book, the only existing copy of which lies hidden in a place that is as deadly as the Abyss itself Another fantasy masterepiece from the author of The Avenger of Thule and Dark Star Rising.