This can be anything from Hyperspace in Star Wars, Warp Drive in Star Trek, travel through the Warp in Warhammer 40k or anything else.
I’ve always liked “slow” FTL travel, where going a few light-years still takes a few days or so. I also really like travel through an alternate dimension like in 40k, Event Horizon, Witchspace in Elite Dangerous.
I wanna know your favorite versions, or do you prefer stories that obey the laws of known physics, like the Expanse or Rimworld?
The Commonwealth Saga is so great.
The portals / train system brings the vibes of the commonwealth up to something like the EU, but on a multi-planetary scale. You have to go through specific points to get planet to planet but the infrastructure is so built up that it’s mostly a travel time problem. It becomes an issue later on that the society has gotten kind of hidebound into a gradual expansion so they never really ‘needed’ FTL for exploration, and now they do.
I get US robber baron vibes too.
Fair warning for those who decide to read it, the book doesn’t treat women particularly well. And it’s the best propaganda I’ve read for capitalism. Read it with eyes open and it’s fun. Great villains. Fun world building. It ends well. And trains!
And it’s like a 1000 page long novel split into two books.