How to Betray Your Country av James Wolff

Disgraced spy August Drummond is in emotional free fall after the death of his wife, fired for a series of security breaches... and now his neighbour on the flight to Istanbul won't stop talking. The only thing keeping August sane is the hunch that there's something not quite right about the nervous young man several rows ahead - a hunch confirmed when August watches him throw away directions to a European cemetery seconds before being detained by Turkish police. A reckless August decides to go to the cemetery, where he meets a mysterious figure from the dark heart of the Islamic State and quickly finds himself drawn into a shadowy plot.