Laura Anne Gilman - Blood from Stone

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.