Named a Best Book of the Year by Literary Hub and Library JournalIn 1990, three boys are born, unrelated but intertwined by circumstance: Dayo, Iseul and Youssef. They are adopted as infants and live in a shared bedroom perched atop a mosque in Staten Island. The boys are a conspicuous trio: Dayo is of Nigerian origin, Iseul is Korean and Youssef indeterminately Middle Eastern, but they are so close as to be almost inseparable.

Nevertheless, Youssef is keeping a secret from his brothers: he has an imaginary double, a familiar who seems absolutely real, a shapeshifting creature he calls Brother.