Jack Higgins 
Comes the Dark Stranger [EPUB ebook] 

Martin Shane was tortured, starved and broken. But a memory has surfaced… A memory of the man who did this to him. And he must pay.His memory has shut down, closed itself off to protect him from the violence in his past.But fragments are coming back… Suggestions of names, places, faces. Then… the memory of a terrible betrayal.In order to find peace, Martin Shane must first find the man who delivered him and his comrades to their enemies.And when Shane finds him, he will pay.