Brian P. Cleary is the author of the Math Is CATegorical ® series, the Adventures in Memory series, the Sounds Like Reading series, and the best-selling Words Are CATegorical ® series, including Stop and Go, Yes and No: What Is an Antonym?, How Much Can a Bare Bear Bear?: What Are Homonyms and Homophones?, and To Root, to Toot, to Parachute: What Is a Verb? He is also the author of Rainbow Soup: Adventures in Poetry, Rhyme and PUNishment: Adventures in Wordplay, Peanut Butter and Jellyfishes: A Very Silly Alphabet Book, and The Laugh Stand: Adventures in Humor. In addition to his work as a children's author, Mr. Cleary has served as a tutor in an adult literacy program.
Brian Gable is the illustrator of many of the Words Are CATegorical ® books, as well as the Make Me Laugh joke books and the Math Is CATegorical ® series. Mr. Gable lives with his children in Toronto, Canada, where he also works as a political cartoonist for the Globe and Mail newspaper.