I read this several times as a teenager, at which time I was neck deep in a massive Card phase. It's a collection of several of Card's earliest stories, all set in a future world where the planet is one giant city, people take a drug that allows them to "hibernate" for years without aging, and which has basically no culture, art, or any other redeemable quality.
At the center of it are two men, Jason Worthing, who is the last descendant of a race of people who can read minds, and Abner Doon, who pulls all the strings in the world (though we're never told how he acquired his power). Doon wants to destroy the world, and he sends Jason and some colonists off to found a new world way off in space.
There are really three stories at play: 1) the world before Jason is sent away, on the planet Capitol, 2) Jason's colonized world, which is eventually called Worthing, and 3) another unnamed world, in a town called Flat Harbor, where Jason comes after everything is done, and the above two stories are told via flashback.
It's kind of convoluted, but somehow it made perfect sense to me, even as a teenager. I enjoyed the inventiveness of the world of Capitol the most, which is mostly straight sci-fi. In the latter two story arcs, Card gets into a lot more moralizing.
I'm sure there are many ties to Mormonism around, but I don't know much about it.
The writing quality is good, not great, and it gets heavy-handed at times. There are better sci-fi stories, but this gets an extra bump from me for nostalgia's sake.