4 Mila walked along the canal path, Zippy running along next to her, excited to be out in the warmth of the afternoon. He sniffed in the hedgerows and snuffled in the reeds as a pair of iridescent dragonflies flitted about his head. Mila thought about Sienna. The young woman didn't know anything about her Mapwalker heritage and it made Mila wonder what her own life would have been like if she'd never known. A robin trilled in the hedgerows by her side, then the peep-peep of new ducklings came from the canal as the little balls of fluff paddled fast beside her hoping for a crumb. With every step, she was grateful. Grateful that she wasn't in London, in the tower block she grew up in, where she could barely walk a meter or so along the corridor. She used to run up and down the flights of s