Something strange is happening in Beastium. There is a dust storm in the wind land and a new mutant beast. Will Kai and BC be able to battle the new beast with their new gear? Will Kai battle well enough to prove himself a worthy Border Captain?

Previously published as Stormasaurix. Kai Masters is a border guard and beast battler. Things have changed again in Beastium. There are new beasts. Bigger, stronger beasts. Mutants. Kai must mix things up. Can he win against the storm mutant?

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?

Kai Masters is a Border Captain. He must battle beasts to keep Earth safe. There are more beasts in Beastium. Mega-mutants. Kai needs help. He must build a team. He must choose a battle partner. Can Kai and Will win against the ice mega-mutant? Previously published as Chillterratan.

Formerly published as Aquatan. Kai Masters is a Border Guard. He must battle beasts to keep Earth safe. Was Kai right to choose the Torpedo Crossbow to battle the water beast? Will it work against toxic jellyfish? Will it be enough to take on a wave attack?

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.

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?

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!

Something strange is happening in Beastium. A new mutant beast is filling the water land with rocks. Will Kai and BC be able to battle the new beast with their new gear? Will Kai battle well enough to prove himself a worthy Border Captain?

Kai Masters is a Border Captain. He must battle beasts to keep Earth safe. There are more beasts in Beastium. Mega-mutants. Kai needs help. He must build a team. He must choose a battle partner. Can Kai and Jay win against the lava mega-mutant? Previously published as Torlavasaur.