I know that Dr. Fimi likes to know about new books within this sub-genre - so what have you read in children's, tweens', CoA, teens', and YA age groups that you'd recommend?
(sub-text, what should I read next?)
I'll suggest "Through the Eyes of a Raptor" by an author local to me, Julie Hahnke. I see she has another one after that - not a sequel - but I haven't read it.