This is quite a tale. Steve was told his little brother died but later in life he sees a picture of him grown.
Joffe Books and Net Galley let me read this book for review (thank you). It has been published and you can get a copy now.
His little brother has gone through several families since he was given away. But no one is still alive or they won't tell what they know.
The private detective that Steve hired isn't about to give up. He finds various people who know what happened but they won't give it up. He keeps searching.
He finally finds him but there is a special twist at the end...