The Miraculous by Jess Redman

Eleven-year-old Wunder Ellis is a miracologist. In a journal he calls The Miraculous, he records stories of the inexplicable and the extraordinary. These miracles fill Wunder with the feeling that he is not alone, that the world is magical, that he is part of something brighter than he can imagine. But then his newborn sister dies, at only eight days old. If that can happen, then miracles don’t exist. So Wunder gets rid of The Miraculous. And he stops believing. Then Wunder meets Faye—a cape-wearing, outspoken girl with losses of her own. Together, they find an abandoned house… Read more.