Discover an exhilarating world of learning by solving a series of mathematical problems. Finding the answers will enable readers to advance through an exciting
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 t
The rollicking Pathfinders treasure hunt continues as the five campers from Mystery of the Moon Tower get swept away in a new search for clues that may lead to