In very good condition 
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!
The Cavern of Clues is a mathermatical mystery of calculations, will you survive untill the end? Make your way through this thrilling adventure, using your maths skills to decide how the plot unfolds. Complete your mission and become a maths whizz at the same time!
Discover an exhilarating world of learning by solving a series of mathematical problems. Finding the answers will enable readers to advance through an exciting adventure story. Brand-new series combines maths and literacy skills.
Thrilling stories, with highly detailed illustrations, make learning maths fun. Focuses on core areas of mathematical learning. Easy-to-use flexibound format.