The Man in the Corduroy Suit by James Wolff

"A wonderful, artful, absorbing espionage novel." Adam Brookes, author of Night Heron
The story of an internal investigation into the past of a British spy suspected of having been turned by Russian agents.  British intelligence is in a state of panic. Cracks are appearing, or so a run of disciplinary cases would suggest. To cap it all, Willa Karlsson, a retired secret services officer collapses, the victim of what looks like a Russian poisoning.
Leonard Flood is ordered to investigate – and quickly. Notorious for his sharp elbows and blunt manner, Leonard's only objective is to get the job done, whatever the cost. When Leonard discovers that he is also a suspect in the investigation and that Willa's story is less a story of betrayal than one of friendship and a deep sense of duty, he must decide whether to hand her to her masters or to help her to escape.

The third in the espionage trilogy The Discipline Files, after the acclaimed debut Beside the Syrian Sea, and its follow-on novel How to Betray Your Country.
Written by an James Wolff is the pseudonym of a young English novelist who worked for the British government for over ten years before leaving to write spy fiction.

Against the backdrop of increasing Russian spying and interference (including assassination) in the UK, this novel explores themes of loyalty and betrayal in modern intelligence work, threatened from the inside by whistle-blowers, serial leakers and Robin Hood hackers. A taut thriller about the thin line between following your conscience and following orders. A fascinating conundrum we have been struggling with for decades. Edward Snowden, hero or traitor?