Read all the books. Had to take the Prime series with a grain of salt though. What you saw Reese do on Prime was nothing compared to the absolute vulgar display of violence depicted in the books. They toned it down a bunch.
I’m horrified to see what Netflix will do with The Gray Man. I sincerely hope they stay with the books which were written more like a movie scripts.
I was reminded of the Jack Reacher series but more military less civilian.
I just read the synopsis of the second book, “True Believer”, and it looks like Reese resolves the medical issue he had in Book 1. I don’t want to say more as a spoiler.
“They toned it down a bunch.”
I watched one of those Hallmark Mystery movies, right after I read the book. I was very surprised at how much tamer the movie was. They made it a lot less gruesome and scary.