This might be a tough one. A few years back I read a Trek book. I can't remember what iteration of Trek but I want to say TNG era. All I can remember is that the epilogue was set many years in the future, in comparison to it's setting and it was describing a federation ship, it's crew and tech of that era. I want to say it involved some sort of AI and a description of some new propulsion system. The Q series of books keeps coming to mind but if I'm honest, I'm having trouble reconciling the two concepts. I know it's a big ask, but if anyone out there has any idea of what I am talking about, I'd love anymore info.