Fascinating premise but I'm not sure what age range this is targeted toward. The narrative voice is a very young-sounding one. The POV character is supposed to be 14, but to me he and his friends seemed more like twelve, or even very bright ten or eleven year-olds. I spend a lot of time around teenagers, and these kids just didn't feel like authentic teenagers to me. Since the book tackles subjects that seem a little mature for middle grade, I don't know that it would be a good fit for that age range either. I do hope it finds an audience! It reminded me a lot of Mockingbird by Kathryn Erskine -- another highly recommended book about a girl facing the death of a sibling.