These authors' works have the genre "humorous stories"; and the subjects "nine-year-old boys," "princesses," and "eleven-year-old girls."

These authors' works have the subjects "nine-year-old boys," "courage in children," and "moles (animals)."

These authors' works have the subjects "dragons," "nine-year-old boys," and "children and dragons."

These authors' works have the subjects "dragons," "children and dragons," and "courage in children."

These authors' works have the subjects "dragons," "nine-year-old boys," and "children and dragons."

These authors' works have the subjects "dragons," "fear of dragons," and "children and dragons."

These authors' works have the subjects "dragons," "nine-year-old boys," and "princesses."

These authors' works have the subjects "dragons," "fear of dragons," and "nine-year-old boys."

These authors' works have the subjects "dragons," "eleven-year-old girls," and "wizards"; and illustrations that are "fanciful illustrations."

These authors' works have the genre "fantasy fiction"; and the subjects "dragons," "nine-year-old boys," and "boys."

These authors' works have the subjects "princesses," "eleven-year-old girls," and "fathers and daughters."