Christopher Sebela 
Dead Letters #1 [PDF ebook] 

Waking up in a fleabag motel with bandaged arms and a revolver on his desk, Sam doesn’t remember a thing — not how he got here, where here is, or who he is. But the armed men knocking on his door do and Sam will have to use every trick from his forgotten repertoire to outrun and outsmart his way through a hardboiled wonderland of gang wars, femme fatales and big secrets.