Almost every day, Adrian goes to school with knots in his stomach. He feels different from the other children, and alone. Whenever the teacher calls on him, his heart starts to pound and time stops. But he finds respite in his rich imagination -- a world full of color and joy in which he is a circus performer, capable of spectacular feats. One day Adrian encounters a huge wolfhound that seems to be lost. He names her Heidi, takes her home,...