Good to know, thank you. I guess I should research better before buying. Since I'm early in, maybe I should skip this one, finish the series, read the New Earth books and come back to it. The Gateways books don't seem to dependent on one another.
Yeah. You really lose nothing, big-picture-wise, if you skip the Challenger portions for now. In fact, there's an argument for skipping the Challenger portions entirely - after Gateways, she never wrote any more, and there are a ton of threads left hanging. You might be happier skipping New Earth and Challenger completely - why get invested in a story that doesn't continue?