Bone by bone - Carol O'Connell

In the northern Californian town of Coventry, two teenage brothers go into the woods one day but only one comes back. No one knows what happened to the younger brother, Josh. Twenty years later, when the older brother, Oren, now an ex-investigator for the Army Criminal Investigations Department, returns home after many years, he is confronted on his first morning back with a human jawbone, teeth still intact, thrown onto the front porch. Josh is coming home . . . bone by bone.

Using all his investigative skills, Oren sets out to solve the mystery of his brother's murder. Coventry is a town full of secrets and secret-keepers but the greatest secret of all belonged to his brother, and it is only by unravelling it that Oren can discover the truth that has haunted them all for twenty years.