This is a superb book, a mystery in the John LeCarre mold. Secrets abound: What will someone do to survive in a genocidal war? Was do we really know about a father when he goes missing? The setting is contemporary Toronto with topical issues like Jihadist recruitment. The back-story is the tragic conflict in Lebanon from 1976-83=2. Unanswered questions are rampant – this is just great writing, in part about journalism: can the truth ever be revealed.