Looking for Something like John Wick

I'm looking for a book or series that has a John Wick sort of vibe. Preferably with a female MC, but I'd love a good spy/assassin/crime/etc novel or series. Specifically one that shows an extensive underground crime network, that's really what I'm most concerned with, I was fascinated with the network in those movies and I'd love to read something similar.

Edit: Something like Killing Eve as well works.