52 Books in 52 Weeks: Book 17: "Look Again" by Lisa Scottoline

Ellen Gleeson can't get that white "HAVE YOU SEEN THIS CHILD?" card out of her mind.  It came with all the other junk mail, but she couldn't quite bring herself to throw it away.  The resemblance of the age-progressed photo of the missing baby to her own three-year old son Will was uncanny. Like they were twins.  But Will didn't have a twin.  She had adopted him as an only child.

From the very beginning of this novel, you have a pretty good idea where it's going. But the end will surprise you. 

Sojourner