1This full-color book contains four different exciting adventure stories with an interactive twist To progress through each story, readers ages 7 and up must solve a series of fun math puzzles. Help the Infinity Squad save Prime City from the evil Doc Zero, work with Anna Kadabra to solve the riddle of the Division Dragon, blast into space the Haley Comet and the Mathtronauts, and explore the mysterious city of El Numero The perfect book to reinforce school learning on a wide range of different math-related topics.