Apollo and Brownie are unaware that the apocalypse is at hand, so when their owners don't return and they run out of food and water, the dogs venture into the world, where they team up with a police dog, a flea that quotes Sun Tzu's The art of war, and others in an attempt to survive.
When a place in a book called Happy World becomes just too perfect and sweet for a tiger named Knuckle and a bear named Potty, they decide the only way to get out is to erase it.
Suzy spends her year in first grade waiting for her father, who is serving in Vietnam, and when the postcards stop coming she worries that he will never make it home.