Creation in Death by J.D. Robb

Lieutenant Eve Dallas keeps the streets of New York City safe in this extraordinary series. But even she makes mistakes, and is haunted by those she couldn't save - and the killers she couldn't capture. When the body of a young brunette is found in East River Park, artfully positioned and marked by signs of prolonged and painful torture, Eve is catapulted back to nine years ago. A man the media tagged "The Groom" - because he put silver rings on the fingers of his victims - had the city on edge with a killing spree that took the lives of four women in fifteen days. But now, The Groom has returned - and Eve's determined to finish him. Familiar with his methods, Eve knows that he has already grabbed his next victim. Time is running out on another woman's life.