I read this book, Dark Waters, about the submarine, NR-1. Small, tough, and powered by a tiny nuclear reactor. NR-1 did some amazing things during the cold war, like searching out and finding an F-14 at the bottom of the ocean with a nuke attached. It was also one of the most terrifying boats to work onboard.
Side note: book 3, Operation Blue Eagle is coming this winter! Join my email list so you can get the latest updates.