Might be an interesting read

Redwood: The Untold Story of the Cold War's Most Extraordinary Spy.

Taking readers through shadowy back alleys of Tehran, across bloody streets and into cloistered intelligence offices, Ben Macintyre unfolds a world in turmoil, where no one’s motive is what it seems, and exposure means death. As Kuzichkin helps the Soviet leadership plot an overthrow of the Ayatollah’s fledgling regime—and the American government secretly contemplates a nuclear response if they do—it falls on MI6’s resourceful young undercover officer Ian McCredie to spirit Kuzichkin’s vital information back to the West. But when both Iranian intelligence and the KGB close in on the Russian double-agent, McCredie must design an improbable high-stakes escape plan for Kuzichkin, in which failure is almost certain and the direction of the Cold War hangs in the balance.

Commission Earned