Jack Canfield is an American author and motivational speaker. He is best known as the co-author of the Chicken Soup for the Soul series, a collection that has grown to include more than 250 titles and achieved over 500 million copies in print across more than 40 languages, making it one of the most widely distributed book series in the world. In 2005, Canfield co-authored The Success Principles: How to Get From Where You Are to Where You Want to Be with Janet Switzer, expanding his work beyond the Chicken Soup series into the self-help and personal development genre.