His Hippopotamus Smile is an uplifting account of an ordinary family whose lives were shattered but became whole again. When a young boy begins to undergo a personality transformation, family life becomes an agony of worry, violence and escape. As Dr. Cooper, a psychologist, finally pieces together the puzzle of what happened to Bobby Roman, he effects a total cure. This heartwarming story is a message of hope for other children and their families and gives the reader an understanding of a treatment regimen that works.