Identity crisis

the long version

"Trading places with his doppelganger, Mason Dillon, seemed like a great idea to Vietnam War veteran Adrian Wylde. After all, Mason had no desire to return to the United States after the two were ambushed and declared MIA five years earlier. It's not as if Adrian stole Mason's identity. Mason wanted him to take it. Living as Mason, Adrian learns of his doppelganger's true biological father. With Mason's continued blessing, Adrian claims his look-alike's birthright and lives a life that is a dream come true. But as the family's true colors begin to show, Adrian's idyllic life turns into a nightmare. After a nearly fatal accident leaves Adrian with no memory of his past, he only knows how to live in the present--as Mason Dillon. As Adrian's life turns into a living hell, recovering his lost memories--the knowledge of his true self--is his only hope of escape."--Back cover