Epic animal fantasy. A new hero to die for. Smaller than a teacup. Braver than a giant. The greatest mouse warrior since Reepicheep. We’ll follow him to the ends of the Earth. At the start of this story Hopper is just an ordinary pet mouse. Until he escapes from the pet shop, and finds himself below the bustling streets of Brooklyn. Amid the web of subway tunnels is Atlantia: a glorious utopian land of rats. Here, cats leave rodents unharmed and Hopper is treated as a royal guest. But all is not as it seems… Rebels. Secrets. Betrayals. An epic battle. Caught in the crosshairs of an terrible conflict, Hopper must face a destiny he could never have imagined.