The Stranger by Harlan Coben

The Stranger appears out of nowhere, perhaps in a bar, or a parking lot, or at the grocery store. His identity is unknown. His motives are unclear. His information is undeniable. Then he whispers a few words in your ear and disappears, leaving you picking up the pieces of your shattered world. Adam Price has a lot to lose: a comfortable marriage to a beautiful woman, two wonderful sons, and all the trappings of the American Dream: a big house, a good job, a seemingly perfect life. Then he runs into the Stranger. When he learns a devastating secret about his wife Corinne… Read more.