Already faster and more powerful than the last 17 species that they have eliminated or subjugated, the Krall have set their sights on humankind.After testing humans on their future home world of Koban and finding them worthy opponents, the Krall start a war of slow extermination with the rest of humanity. This war is intended to last generations as they apply their own version of "natural selection" to cull their weaker warriors in combat, purifying the Krall gene pool with finest warriors for breeding.Why? The Krall desire to one day become powerful enough to live on the world of Koban, where the impossibly fast and powerful animals have proven to be too much for the Krall to master without the help of technology. The only way the Krall survive on Koban is to live in isolated and well-protected domes, safe from the fauna they fiercely desire to dominate. Only through the attrition of war will the Krall perfect their bloodlines to become the masters of Koban.Before the Krall departed Koban to start their new war with humans, they destroyed the protections that allowed the Krall to survive on this dangerous planet. The Krall left the human "test animals" on the planet to fall victim to the high gravity, and to the fast and savage wildlife with its deadly predators. Big mistake. They should have killed the "test animals" themselves! The bio-scientist they left behind added Koban genes to the next generation of humans. They are becoming what the Krall sought to be.The humans on Koban, locked in a struggle for their own survival at home, return to the stars to help humanity fight and, outnumbered, take the war to the Krall.(Book 1 was Koban, in this series.) Book 3, Koban: The Rise of the Kobani, coming in fall 2013.