Blood From Stone by Laura Anne Gilman

Discover the magical world of the Retrievers and the Cosa Nostradamus, in the final book of this popular series by Laura Anne Gilman.

Wren Valere's job is driving her crazy. She's still Manhattan's most sought–after Retriever, but after last year's deadly confrontation with the Silence, all this magic–user wants is a break. With her apartment going co–op and her relationship with the demon P.B. putting stress on her romance with partner Sergei, is Wren finally ready to settle down to a more stable existence?

Not likely.

Because when you're good, trouble always finds you. Wren's next assignment puts her on the wrong side of a child–snatcher – and a collision course with her past. But to save a friend – and protect her future – Wren must pull off the most important Retrieval of her life…and for once magic isn't on her side.