You should never miss Once! A book about a very raw subject. The author has my deepest respect for the portrayal of the whole series. I would thoroughly recommend it, if you like books such as The Boy in the Striped Pyjamas by John Boyne , Operation Einstein (Edelweiss Pirates #1) by Mark A. Cooper and enjoy a good historic fiction book that is suitable for ages 10- and up, then Once is another good one to add to your TBR list.