I was just listening to a podcast that did a season about her [1]. It's kind of in an audiobook style, with some guesses about dialog, which makes it pretty engaging to listen to beyond just that the story itself is interesting.

If you're interested in it, they also did a season on Duško Popov [2] (supposedly the spy that was the inspiration for 007), and one on Aimen_Dean who was an MI6 spy in Al-Qaeda, which includes an interview with him at the end.

[1] https://wondery.com/shows/the-spy-who/season/3/

[2] https://en.wikipedia.org/wiki/Du%C5%A1ko_Popov

[3] https://en.wikipedia.org/wiki/Aimen_Dean