The Guardians - Book 2 continues the story about the human race fighting to survive another extinction event caused by an alien race known as the Tyrax. The Tyrax first tried to wipe the human race off the face of the planet by using a nanobiotechnology weapon to terraform Earth for their own unique DNA makeup. Earth survived with the help of a friendly alien race from Latar who sent a Guardian to watch over Earth five hundred years ago. His name is Òmon and he helps prepare the human race for the eventual invasion of the Tyrax and teaches humans how to fight back. In Book 2 the Tyrax have returned to finish the job with a large warship fleet and a new weapon they call the Destroyer. It is a large asteroid that will do more damage to the biosphere than the meteorite that wiped out the dinosaurs sixty-five million years ago. To prevent this new extinction event, Òmon returns with more Guardianships to defend Earth from the Tyrax attack. Brandon Cole, Mike Wolinsky, Lizzy Rollins, Paul Ballard, Manco Cusi, Amaru Tupac and all the other human recruits from centuries past join forces with the new 28th Space Strike Force to battle the Tyrax warships in the Asteroid Belt. The space battle is devastating to both sides and thousands of lives are lost in Earth’s desperate struggle for survival. The defenders do all they can to try and stop the asteroid from destroying Earth. Saving the human race, Earth and the solar system from Tyrax colonization is just the first step in the war with the Tyrax. Out of necessity, humans must become the new Guardians of the galaxy if they wish to overcome and defeat this cruel and merciless race of alien beings.