Mick Herron is a comparatively new spy thriller writer and if you have not read any of his books I suggest you start! If you decide to give him a go read “Slow Horses” first. It is in first book in this genre and although they all stand alone it will give you a feel for the characters who will appear in subsequent books. “Slow Horses” concerns the activities of a group of British agents who have messed up in some way and have been put out to grass. All the books, he has published four so far, are written with humour but also exciting investigations. Give him a try.