"What happened, Unca Dave?" Young people today deserve an answer. To restate our hypothesis: on November 4 1953, Theodore F. Schism climbed into his mother's defrosting refrigerator and shut the door. He was 9 years old. The first book of his story was appropriately called In. Now comes the middle, the "unloved child," and yet its pages introduce the villain of the piece, a role which by definition is far more interesting than that of any so-called...