Trials of the Warmland is the second book of the Feral World, a world set in Fifty-First Century America, three thousand years after the asteroid Apophis struck the Earth and destroyed all technology, cities and civilization. Humanity now lives in harmony with the Earth, with only stone-age tools and the rubble left behind by a long-gone age. Gaddy Bergmann continues the odyssey of Blake and friends, the last remnants of the Kamishi tribe. They have reached the Warmland, but now they find that the Warmland is not the paradise they thought, and making it their home is not easy. There is no respite from danger, and now a new adversary, the Lunari - descendants of those few who escaped the apocalypse by colonizing the moon - have returned to Earth with ideas of their own.