Subject(s): Mood (Psychology) -- Juvenile fiction. | Chimpanzees -- Juvenile fiction. | Animals -- Juvenile fiction. | Friendship -- Juvenile fiction. | Mood (Psychology) -- Fiction. | Chimpanzees -- Fiction. | Animals -- Fiction. | Friendship -- Fiction. | Juvenile Fiction -- Animals -- Apes & Monkeys. | Animals. | Chimpanzees. | Friendship. | Mood (Psychology) | Chimpanzees -- Fiction. | Fiction. | Juvenile works. | Picture books. | Children's stories -- Pictorial works. | Picture books.