To solve some mysteries, one must embrace the impossible.

Has there ever been a more unlikely pair of consulting detectives than Jesperson and Lane? They certainly make a striking duo: Mr. Jasper Jesperson, with his shock of red hair and seemingly encyclopedic knowledge of all subjects—save common sense—and Miss Lane, whose logical mind is matched only by her fascination with psychic phenomena.

Their talents are rare . . . as are their customers. So when Jesperson and Lane are hired to track the nocturnal wanderings of a sleepwalking London business owner, they’re simply happy to be working again. The case begins as a window into the séances and other supernatural parlor games that are so popular these days, and takes a sinister turn as the intrepid investigators pull back the curtain on the cutthroat rivalries underpinning polite society.

But after several mediums go missing, it’s clear that Jesperson and Lane are in over their heads. For they’ve uncovered a presence beyond their understanding—an evil force that won’t hesitate to kill in order to achieve its nefarious ends.

Praise for Lisa Tuttle

“A stylish, distinctive storyteller.”—The Washington Post Book World

“This John W. Campbell Award–winning author remains one of fantasy’s best.”—Publishers Weekly