Shadow Seed - The Rhean Chronicles, #2

The Rheans return to their homes only to find out that the Pelasgians now threaten to strike at every city in Rhea. Unable to unite their forces, the Rheans are forced into a desperate struggle for survival. Meanwhile, Sara will come face-to-face with Nibiru. As she learns more about the Pelasgian, she will uncover a horrible secret Leon has been hiding. Vampires, mummies, werewolves and other creatures of mythology are reimagined as various races who must join forces to confront an ancient evil.