These authors' works have the genre "easy readers"; and the subjects "friendship," "play," and "siblings."

These authors' works have the genre "easy readers"; and the subjects "quarreling," "lost cats," and "conflict resolution."

These authors' works have the genres "easy readers" and "picture books for children"; and the subjects "friendship," "boys," and "girls."

These authors' works have the genre "easy readers"; and the subjects "friendship," "younger siblings," and "fear of monsters."

These authors' works have the genre "easy readers"; and the subjects "friendship," "boys," and "hide-and-seek (children's game)."

These authors' works have the genres "easy readers" and "picture books for children"; and the subjects "pigs," "rabbits," and "siblings."

These authors' works have the genres "easy readers" and "picture books for children"; and the subjects "boys" and "play."

These authors' works have the genre "easy readers"; and the subjects "boys," "younger siblings," and "dogs."

These authors' works have the genres "easy readers" and "picture books for children"; and the subjects "friendship," "boys," and "hide-and-seek (children's game)."

These authors' works have the genre "easy readers"; and the subjects "friendship," "best friends," and "puppies."

These authors' works have the genres "easy readers" and "picture books for children"; and the subjects "friendship," "boys," and "games."

These authors' works have the genre "easy readers"; and the subjects "friendship," "boys," and "girls."