The eco sci-fi adventure that began with Yesterday continues with a thriller which can also be read as a standalone.

2063, United North America: Climate change has rendered great swathes of the country uninhabitable, the rise of robot workers has created mass unemployment, eco-terrorism is a constant threat and a 2059 nuclear exchange between Pakistan and India has torn large holes in the world's ozone layer and pushed humanity's existence towards a cliff.

Garren and Freya have managed to escape that nightmare world and lose themselves in 1986 Vancouver. But the future's...