The Smoke: A Creeping Narrative by Tony Broadbent

Brought up in one of London’s famed street markets, Jethro the cat burglar is as smart as he is streetwise, which is just as well, as he always needs all of his wits about him to pull off the perfect job and not get caught. After he breaks into the Soviet embassy and steals jewels belonging to the ambassador's wife, Jethro comes to the attention of His Majesty’s Secret Service, who forces him to revisit the place again to retrieve a code book for them. But this is all just a set up for a thief to catch a thief, and it leads to a deadly game of cat and mouse to see who will get to Jethro first: London’s gangsters, MI5, or one of the Soviet’s most formidable secret agents.