Brian P. Cleary is the author of the Words Are CATegorical®, Math Is CATegorical®, Food Is CATegorical™, and Animal Groups Are CATegorical™ series, as well as several picture books. He lives in Cleveland, Ohio.
Brian Gable is the illustrator of many of the best-selling Words Are CATegorical® books, as well as the Math Is CATegorical® series. Mr. Gable lives in Toronto, Canada.