This looks like an interesting book. I like the plot idea. Just enough complexity but not too much. Alas, my kids are beyond that age range, or I’d have them read it. Good luck to you!
PS I wish I could say the plot elements aren’t appropriate for the age group, but in this day and age, with all the family breakups and violence all around, I don’t think you’re likely to shock too many kids. Depending on how it’s written, of course.