I picked up Academy 7 after I read Tamora Pierce's glowing review on Goodreads. I was also surprised, as she was, that it was sci-fi. The cover gives no indication. While it's light on space and science, there's just enough to give it that sci-fi flavour.
YA novels set in boarding schools were (and still are, really) de rigeur in the literature when this book was published (2009), and it can be a little difficult to get excited about the setting. But Osterlund manages to make it fresh with the sci-fi aspect and doesn't fill the pages with school cliches. Aerin Renning stands out from the typical new-girl-in-school character. I enjoyed her almost Aspergers-like personality, particularly when it was shown through Dane's eyes. Osterlund takes her time developing the friendship and romance between the pair. It's a slow burn rather than the bolt out of the blue, inexplicably-drawn-to rubbish that's so common in paranormal lit. I liked both of them very much. In fact, all the characters were carefully drawn and believable.
Academy 7 is light on sci-fi, but heavy on characterisation and story. A very pleasant read.