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. Was Kai right to choose the X-Archer T10? Will it be enough to beat the Terrasaur rock-beast's hurl attack? With cool diagrams and illustrations of various gadgets, and a graphic novel sequence of the battle scene, Kai's adventures in Beast-hunting really come to life!

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. In this exciting, action-packed new series, a young boy must use various technological weapons at his disposal to defeat the Beasts of Beastium. With every battle that Kai wins, he unlocks more gear to help him defend Earth. In this installment, when dead fish covered in glowing moss wash up on the beach, Kai knows it's time for battle. Is he right to choose the Torpedo Crossbow and the Super-Zap-6 to battle the water beast? Will it work against toxic jellyfish? Will it be enough to take on a wave attack? With simple sentence structure, illustrations of cool gadgets, and a fantastic spread depicting the final action sequences, this series is guaranteed to engage reluctant readers and keep them hooked until the end.

Formerly published as Terradon. Kai must face the beast from the rock world. Will he need more than his X-Archer T10 to win against the hurl attacks?

All four Battle of the Worlds books in one great value giftbox PLUS an exclusive Border Guard Log Book! The water battle of Aquatan. The rock battle of Terradon. The fire battle of Infernix. The wind battle of Tornados. Packed with adventure and value!

The battle against the Beasts of Beastium continues! 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! When it starts to snow in the middle of summer, Kai knows it's time for battle. Kai and his robot dog BC3 build their own Sub-Skate to battle the growing ice beast. But will their tools be enough to stop the beast from breaking through the border wall? Can they save the Earth from deep-freeze? Things will need to heat up!

Formerly published as Tornados. When a freaky tornado hits, Kai chooses his Astro-Jet Striker to battle the wind beast. Can it win over a wind attack?