The title of this book is I'm Your Peanut Butter Big Brother and is written by author Selina Alko. The book I'm Your Peanut Butter Big Brother is published by Alfred A. Knopf Books for Young Readers. The ISBN of this book is 9780375956270 and the format is Hardback. The publisher has not provided a book description for I'm Your Peanut Butter Big Brother by Selina Alko.