William Potter 
Maths Adventure Stories: Infinity Squad to the Rescue [EPUB ebook] 
Solve the Puzzles, Save the World!

Optiman, Multi-Girl, and Mr. Calculus are Prime City’s greatest superheroes. They’re also mathematical marvels! Join them in this action-packed adventure story, which will put your number skills to the test. In their quest for justice, our heroes will have to overcome Doc Zero’s diabolical challenges. Help them on their quest by following cryptic clues, interpreting mathematical maps, cracking number codes, and much more!This awesome book will make you a maths superhero!