Technically a ‘spy’, but for most of his career more a low level bureaucrat.
Masha Gessen:
“The Man Without a Face is the chilling account of how a low-level, small-minded KGB operative ascended to the Russian presidency and, in an astonishingly short time, destroyed years of progress and made his country once more a threat to her own people and to the world.”
Here's just one book. https://www.amazon.com/Man-Without-Face-Unlikely-Vladimir-ebook/dp/B005GSZISA