A ten-year-old is tasked with saving the world in this adventure novel that is "captivating, satsisfying, 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...