Athenian Blues by Pol Koutsakis. The author was born in Crete in 1974, writes novels, plays, and screenplays. Athenian Blues is his first novel to be translated into English. Baby Blue, the sequel to Athenian Blues, is expected to be published by Bitter Lemon Press in 2018.
The main character, Stratos, is a hit man who goes to length to make sure victims truly "deserve their fate." He is helped by childhood friends: a homicide cop, a transsexual hooker, and Maria, the love of his life.
An unusual plot with unusual characters. I am eager to see how well this book will go down with mystery readers.