[4] The Book of Koli is set in post-apocalyptic Britain, in the village of Mythen Rood.

Much of the life of the villagers of Mythen Rood is dictated by needing to protect themselves from the dangerous flora and fauna that populate the dense surrounding forests.

The book begins with Koli recounting his dangerous childhood in Mythen Rood.

Outraged, Koli breaks into the Rampart barracks and steals a piece of technology – which turns out to be a Sony DreamSleeve, a fictional audio player controlled by a Japanese AI named Monono Aware (a play-on-words of mono no aware).

Koli, Ursala, Cup, and Monono decide to travel to London in search of old technology and the potential to reverse the homozygosity which has afflicted the remnants of humanity.