This interactive book challenges you to a game of tic-tac-toe with the author that is played by simply turning the pages. Are you brave enough to accept the challenge? You can choose to have Julia Merry play against you optimally at her best, or give you a fighting chance of winning. For children, this book teaches them the strategy and sportsmanship of tic-tac-toe and familiarises them with the numbers 1 to 1304 that label the game states. For adults, it demonstrates that a mere book can behave like a computer game and even surprise you by winning if you are not careful.