Only a wall divides Earth from Beasts of Beastium. Only a boy and his dogbot defend the wall and protect Earth. Kai Masters! Border guard and beast battler. Things have changed again in Beastium. Beasts have appeared in the border-lands, New beasts. Combination beasts. Kai will have to lean quickly to battle these. Can he win against the fire-water-rock beast?

Eggs have hatched in Terradon but it is a not a rock beast. Will Kai be able to battle the new mutant with his new combo gear and super-fast jet? Will he learn how to stop more mutants coming?

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!

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 Power comes this fantasy adventure series for boys. With black-and-white illustrations throughout, including double-page graphic novel battle sequences in every book, Boy vs. Beast is the perfect series for 6- to 9-year-olds.

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?

Things have changed again in Beastium. Captured beasts have escaped from the Outlands but they have changed. They are now mega-mutants and have come back to Beastium. Kai will need help to battle these new beasts. Will Kai choose the right battle partner to beat the mega-mutants?

Only a wall divides Earth from Beastium. The border guards protect the wall and Earth. Kai Masters, border guard and beast battler, is now a captain, and can choose other border guards to help him battle. More beasts have escaped from the Outlands back into Beastium. And now something strange has happened to the pests. Kai will need the help of Border Guard Ying Li and her robotic cat. But will it be enough?