In his letters to his favorite author, ten-year-old Leigh reveals his problems in coping with his parents' divorce, being the new boy in school, and generally finding his own place in the world.
Presents the further adventures of a motorcycle-riding mouse who goes to school and becomes the instigator of an investigation of rodents and the peacemaker for two lonely boys.
Moose, terribly eager to play his part in the alphabet book his friend Zebra is putting together, then awfully disappointed when his letter passes, behaves rather badly until Zebra finds a spot for him.