The ancient holy texts are missing.
The death of the world approaches.
Six extraordinary men have shared one vision of a black tower and a river of blood. Somewhere in the desert wastelands of America, the ultimate battle will be...
On Christmas Day 1884, a desperate plea from a mysterious woman leads Arthur Conan Doyle—struggling physician, aspiring writer, and part-time demystifier of the occult—to a seance in London’s East End and into a fiendish and deadly trap....