Androids, cyborgs, and a colonized moon. This was fun listening and reading (I listened to the first half, had to turn in the CDs, and read the rest in two days). I didn't find the ending at all surprising (and I suspect most teens don't either). And I didn't completely buy the love story part, actually. I'm curious enough to get the second book, though, which I don't often do in series and trilogies. 
 Good for teens who like fairy-tale retellings and dystopias that are fast-paced.