Origin

Did not want to put down this mystery. The protagonist, Lena, is a fingerprint expert confronted with a crime that might just be a statistical blip--a surprising number of crib deaths (SIDS) within a couple of months.  Because of her unexpected success resolving a previous child murder, Lena, almost pathologically private, is the target of enormous attention and expectation from the public as well as her colleagues.

While Lena is not at all sure there is a crime, to start, something about the case troubles her, and leads her to explore her own past more persistently (she was raised by foster parents).  As the investigation progresses, certain details and even pieces of evidence seem to point back to the mystery of her own origin. 

Beautifully written with a compellingly diverse cast of characters; convincingly set in depressed Syracuse, New York; a really terrific read.