Part two of The Other Worlds series is called Ethon. If you've read the first book, you know that the people of the Other Worlds call our earth "Ethon." As I said in the review for The Other Worlds, Ethon is a different sort of book. I'd venture to call it more sci-fi than fantasy, and it takes place on Earth. It’s more graphic than The Other Worlds, but it’s still appropriate for teenagers.
It would be easy to give away too much of the story with this book. It was surprising for me. Which is kind of saying something. It takes a different turn that ties the series together beautifully. It completes it in a way I didn't realize it was lacking. I had no idea what was going to happen next. The Other Worlds is probably still my favorite of two, but they go together. You can't have one without the other. Ethon is a bit slower at the get-go than The Other Worlds was, but it needs that time to form. Sometimes stories start slow because the author doesn't know how to write, and sometimes it's because the story needs to build. Ethon is the latter. Once it gets going, though, it goes.
At the end of The Other Worlds, Will left Olinia and Legann on Earth (Ethon), promising to be back the next day. Except he didn't come back the next day. Or the next. Fast forward a year and a half, and Olinia and Legann are living in Virginia. Olinia is attending the local university, and Legann is in high school, lamenting the loss of his Other Worlds adult status. Where Olinia had been optimistic, determined, and sure of her goal in The Other Worlds, she's now jaded and almost apathetic. Legann, too, is unhappy with their current situation, but he is still hopeful that Will is going to come back for them. As they live their lives in limbo, a suspicious after-school program pops up on their radar. DS Academy is specifically for gifted children, and it is very selective. As Olinia and Legann get closer to it, they realize it's practically a cult. They would have never imagined what it really is.