About this item
A mathematical mystery of calculations.
The fearsome pirate Black Beard has buried his gold, and you have the map that leads the way. If you fail, you will be trapped inside the Cavern forever!
Make your way through these thrilling adventure, using your math skills to decide how the plot unfolds. Complete your mission and become a math whiz at the same time! Finding the answers will enable readers to advance through an exciting adventure story.