Pony by R.J. Palacio
Silas Bird has a genius for a father and a ghost for a best friend. Their simple lives are upended when men take his father in the night, believing him to be a notorious criminal. When Silas goes after them, he finds deep woods and even deeper secrets. R.J. Palacio (author of Wonder) has crafted a surprising departure from her previous work and it is excellent. Trust me, this story is both unexpected and exactly what you want.
—Ivy
