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There is a world populated entirely with living numbers and letters. When dyslexic teenager Stu accidentally transports himself there, his arrival triggers a prophecy that pulls the two rival communities into war. To escape, he must teach a young vowel he befriended how to count. Because letters that count become variables, and variables can use geometry... to fly. In his quest to return home, Stu will have to navigate the dangerous and angular System of Numbers, ruled by the Prime Constant...