"Number 9" tells the story of Enjil, a boy mathematician who is challenged by a spirit to solve the riddle, 'What is the fixed point of the wind?' As Enjil searches for the answer, he and the reader embark on a journey through myth, legend and religion. Enjil's adventures lead readers to an appreciation of chaos theory, symmetry within asymmetry, classical ideas and modern impulses. Along the way Balmond redefines arithmetic for the lay person and opens the gateway to further discoveries.