In Book 2 of this thrilling series for 6- to 9-year-olds, our hero, Kai Masters, must quickly jump into action when burning hot rock falls from the sky. He knows it's time for battle again
Only a wall divides Earth from the beasts of Beastium. Only a boy and his dogbot defend the wall and protect Earth. Kai Masters. Border guard and beast battler.From the creators of Zac Powe
