I’m agonizing over genre again. Elements include swords, civil war era rifles, trains, trolleys, telepathy, scientifically created super humans, and a mentor who wears a brown cloak. If the other technology were based in the 1800’s rather than WWII, I might call it Steampunk. In some ways, it makes me think of Flash Gordon and other stories from that era. The best I’ve come up with is “fantasy where technology takes the place of magic.”
Oh, I forgot to mention the aliens. They’re more like beings from an alternate universe. They don’t have a ship. And the aliens have the whole king/queen/prince thing.
Can I just call it “read the book and then you tell me”?