Carl has written two full-length books and two ebooks about tennis:

Tennis as a Wisdom Practice: A Story About the Quest for Mastery (2022) tells the story of Carl’s quest for a top-ten ranking in the supersenior 70s division of the United States Tennis Association. It provides tips about accelerated learning along with insights into how tennis can teach us about ourselves and help us develop a variety of life skills.

“A thinking man’s tennis player, Frankel brings an observant, inquisitive and insightful mind, along with a fluid writing style, to the joys and challenges experienced by every serious senior player.”
– Steve Gottlieb, winner, four national senior titles.