Roger Tory Peterson revolutionized the way we look at and appreciate birds, animals, and plants. Some kids called him "Professor Nuts Peterson" because of his dedication to his craft; yet he went on to create the immensely popular Peterson Guides, which have sold more than seven million copies, and which birders everywhere appreciate for their simple text and exquisite illustrations. Working closely with the Roger Tory Peterson Institute in Jamestown, New York, author Peggy Thomas and artist Laura Jacques have created a fascinating portrait of a global environmentalist with this very first children's biography of Peterson, a winner of the John Burroughs Nature Books for Young Readers Award.