Antony Johnston and Christopher Mitten"s sci-fi western epic continues! Michael and Abi have resumed their search for A-Ree-Yass-I, leaving the city"s troubles behind them. But before they can cross the wasteland they must face the Dog Tribes - bands of nomads who live and die with hounds by their side. As two tribes go to war, Michael and Abi are caught in the middle! But help can come from the most unlikely of places.