The stunning new novel from the New York Times bestselling author of
The Age of Odin, in which the worlds of Arthur Conan Doyle and H.P.
Lovecraft collide.
It is the autumn of 1910, and for fifteen long years Sherlock Holmes and
Dr John Watson have battled R'lluhloig, the Hidden Mind that was once
Professor James Moriarty. Europe is creeping inexorably towards war, and
a more cosmic conflict is nearing its zenith, as in a single night all
the most eminent members of the Diogenes Club die horribly, seemingly by
their own hands. Holmes suspects it is the handiwork of a German spy
working for R'lluhloig, but his search for vengeance costs an old friend
his life.
The companions retreat to Holmes's farm on the Sussex Downs, and it is
not long before a client comes calling. Three young women have
disappeared from the nearby town of Newford, and the locals have no
doubt who is responsible. For legend has it that strange amphibious
creatures dwell in a city on the seabed, coming ashore every few
centuries to take fresh captives. As Holmes and Watson seek out the
terrifying interlopers, the scene is set for the final battle that will
bring them face to face with the Sussex Sea-Devils, and perhaps with
Cthulhu himself...