The court from page 39 lifts off the paper. Spin it with your finger.
Type the angle you calculated on page 40 and watch the shot fly it.
A 193 km/h serve against your reaction time. Pages 44–45, played for real.
Type YOUR contact height from page 63 and test your own serve.
The cover is a map of the book. Tap each floating number to find its lesson.
The whole book, one game. Every point decided and explained by a formula.