Brian P. Cleary is an American author best known for his engaging and humorous educational books for children. Born on October 1, 1959, Cleary has made a significant contribution to children’s literature with his series "Words Are CATegorical." This series employs rhymes and colorful illustrations to teach kids about the intricacies of the English language, including grammar, punctuation, parts of speech, and wordplay. His aim is to make learning fun and accessible, and to foster a love for language in young readers. Cleary's whimsical approach has helped demystify language arts topics for many children, making him a popular author among educators and parents alike.