The Guardians Series, The Complete Collection, EBooks 1,2,3 - The Guardians Series, Books 1-3, #5

The Guardians - Book 1 begins with an alien attack on Earth by a ruthless and merciless race of aliens called the Tyrax. They send a doomsday weapon that detonates multiple missile warheads over twenty-four sparsely inhabited land areas around the globe causing a biological transformation using nanobots that threaten to destroy all life forms on the planet within days. 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 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. The Guardians - Book 3 concludes the series. Earth space forces learn the Tyrax are building a large particle accelerator to create an antimatter weapon to use against Earth.
The first opponent to build the weapon will win this Galactic Space War between good and evil alien races. On Earth, the world is trying to recover from the damage the Destroyer Asteroid Weapon caused in Greenland and Northern Europe from meteorite fragments. The Tyrax have attempted to destroy Earth and all humans on the planet twice now. It is finally time for the Latarans, its Alliance Partners and Earth to go on the offensive, recapture lost space territories and push the Tyrax back to their dwarf galaxy.