David Thomas 
Blood Relative 

"How well do you know your wife, Mr Crookham?"Peter Crookham arrives home late from work to a bloodbath: his journalist brother, Andy, is dead – covered in knife wounds – and his beautiful young wife, Mariana, is bathed in his blood.Convinced his wife is incapable of murder, Peter vows to clear her name. Yet he is forced to question his conviction when he discovers the subject of Andy’s final investigation – Mariana’s past.This past, Peter will discover, is inextricably linked to one man: an elusive, mysterious figure affiliated with the then East German security service, the STASI.But this man is more than that. Much more. And so is Mariana Crookham.