Sherlock Holmes meets The X-Files in this acclaimed paranormal mystery series from the author of the Fourth Element Trilogy

It's August 1888, just three weeks before Jack the Ripper will terrorize Whitechapel, and another serial 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...

Persepolae has fallen. Karnopolis has burned. As the dark forces of the Undead sweep across what remains of the empire, Nazafareen must obey the summons of a demon queen to save Darius's father, Victor. Burdened with a power she doesn't understand and can barely control, Nazafareen embarks on a perilous journey through the shadowlands to the House-Behind-the-Veil. But what awaits her there is worse than she ever imagined... A thousand leagues away, Tijah leads a group of children on a desperate mission to rescue the prisoners at Gorgon-e Gaz, the stronghold where the oldest daevas are...

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 underworld when she sees one. And he's the most dangerous she's ever encountered. As Jack rampages through London, Lady Vivienne begins to suspect what he's searching for. And if he finds it, the doors to purgatory will be...