Sherlock Holmes meets The X-Files in this acclaimed paranormal mystery series!
It's August 1888, just three weeks before Jack the Ripper will terrorize Whitechapel, and another murderer is stalking the streets of New York. His handiwork bears the hallmarks of a demonic possession—but amateur sleuth Harrison Fearing Pell is certain her quarry is a man of flesh and blood. And she hopes to make her reputation by solving the bizarre case before the man the press has dubbed Mr. Hyde strikes again.
From the squalor of the Five Points to the high-class gambling dens of the Tenderloin and the glittering mansions of Fifth Avenue, Harry follows the trail of a remorseless killer, uncovering a few embarrassing secrets of New York's richest High Society families along the way. Are the murders a case of black magic—or simple blackmail? And will the trail lead closer to home than she ever imagined?
Winter 1888. At an asylum in the English countryside, a man suspected of being Jack the Ripper kills an orderly and flees into the rain-soaked night.
His distraught keepers summon the Lady Vivienne Cumberland—who's interviewed their patient and isn't sure he's a man at all. An enigmatic woman who guards her own secrets closely, Lady Vivienne knows a creature from the shadowlands when she sees one. And he’s the most dangerous she's ever encountered.
As Jack rampages through London, this time targeting rare book collectors, Lady Vivienne begins to suspect what he's looking for. And if he finds it, the doors to the underworld will be thrown wide open…
Across the Atlantic, an archaeologist is brutally murdered after a Christmas Eve gala at the American Museum of Natural History. Certain peculiar aspects of the crime attract the interest of the Society for Psychical Research and its newest investigator, Harrison Fearing Pell. Is Dr. Julius Sabelline's death related to his recent dig in Alexandria? Or is the motive something darker?
As Harry uncovers troubling connections to a serial murder case she’d believed was definitively solved, two mysteries converge amid the grit and glamor of Gilded Age New York. Harry and Lady Vivienne must join forces to stop an ancient evil. The key is something called the Thirteenth Gate. But where is it? And more importantly, who will find it first?