Leo never imagined that time travel might really be possible, or that the objects in H. G. Wells' science fiction novels might actually exist. And when a miniature time machine appears in Leo's bedroom, he has no idea who the tiny, beautiful girl is riding it. But in the few moments before it vanishes, returning to wherever--and whenever--it came from, he recognizes the other tiny rider: himself! His search for the time machine, the girl, and his fate leads him to the New-York Circulating Material Repository, a magical library that lends out objects instead of books. Hidden away in the Repository basement is the Wells Bequest, a secret collection of powerful objects straight out of classic science fiction novels: robots, rockets, submarines, a shrink ray--and one very famous time machine. And when Leo's adventure of a lifetime suddenly turns deadly, he must attempt a journey to 1895 to warn real-life scientist Nikola Tesla about a dangerous invention. A race for time is on! In this grand time-travel adventure full of paradoxes and humor, Polly Shulman gives readers a taste of how fascinating science can be, deftly blending classic science fiction elements with the contemporary fantasy world readers fell in love with in The Grimm Legacy.