Fusing the heart of Julie of the Wolves with the imagination of Little Brother and Ship Breaker, this speculative YA is a must-read for any dog lover.When a global genetic experiment goes awry and canines stop wagging their tails, mass hysteria ensues and the species is systematically euthanized. But soon, Mechanical Tail comes to the rescue. The company creates replacements for "man's best friend" and studies them on Dog Island, where 17-year-old Nano Miller was born and raised. Nano's life has become a cycle of annual heartbreak. Every spring, she is given the latest robot dog model to test, only to have it torn from her arms a year later. But one day she makes a discovery that upends everything she's taken for granted: a living puppy that miraculously wags its tail. And there is no way she's letting this dog go.