Pittacus Lore. The Fate of Ten (Lorien Legacies #6)

For years the Garde have fought the Mogadorians in secret. Now all of that has changed. The invasion has begun. If the Garde can't find a way to stop the Mogs, humanity will suffer the same fate as the Lorien: annihilation.
There is still hope. When the Elders sent the Garde to Earth, they had a plan — one which the Garde are finally starting to understand. In the climax of The Revenge of Seven, a group of the Garde traveled to an ancient pyramid in Mexico known to their people as the Sanctuary. There they awoke a power that had been hidden within our planet for generations. Now this power can save the world...or destroy it. It will all depend on who wields it.
Kindle Edition, 416 p.
Published September 1st 2015