**A ten-year-old is tasked with saving the world in this adventure novel that is “captivating, satisfying, and thrilling at the same time” (*Children’s Literature*).** It’s just another boring Wednesday in May for ten-year-old Flor Bernoulli of Brooklyn, New York. But it turns out to be a day like no other: She finds a mysterious key that gives her special superpowers, takes a journey across the ocean and through the Milky Way, and even meets her long-lost father. It all starts when her favorite neighborhood baker, the mysterious Dr. Pi, reveals that he is an ancient wizard, in charge of every single thing in the world that has the shape of a spiral—from seashells to galaxies to the inside of your ear. He needs her help to save the spiral from two strangers who have come to steal its power and destroy it. And so begins the magical adventure of a lifetime, where Flor learns that only she has the magic to keep the world spinning just as it should.