Here's the review I posted on Amazon. For more reviews, check there - and SF fans, try to get hold of this book!
This is a solid science fiction story with a strong ethical core and intriguing characters. It's a shame it's out of print; this book deserves readers! The other reviewers have done a fine job of pointing out what makes it special; it's just calm, sensible speculative fiction that relies on characters and their moral dilemmas rather than flashy action to propel the plot. I loved human teen Kira's interactions with a couple of young aliens who seem, at first to be hostile to her, and the jam she finds herself in at the end of the book was very suspenseful.
A note on ratings: I try to judge a book or film by what it sets out to achieve and whether it's coherent and well crafted. This one is, and does. It's just a good book.