Born in death - J.D. Robb (In Death #23)

New York homicide detective, Lieutenant Eve Dallas is investigating the mysterious murders of two young professionals. Tougher to deal with is her best friend Mavis' nearly-to-term pregnancy, and Mavis’ concern over the strange disappearance of another pregnant friend. Now Eve is fighting on two fronts, hunting a ruthless killer, searching the streets for a missing woman – and time is running out. Because Eve has a terrible hunch that she'd better recover the mother-to-be quickly, or an innocent life could be ruined forever...