'Only a wall divides Earth from the beasts of Beastium.
Only the border guards defend the wall and protect Earth.
Kai Masters is a border guard and beast battler.
'Things have changed again in Beastium. There are new, bigger beasts.
'Mutants.
'Kai must mix things up. Can he win against the storm mutant?' (Publication summary)
'Beasts have escaped from the Outlands and are back in Beatium. Two beasts are fighting in the fire land.
'New beasts.
'Mega-mutants.
'Will Kai and his battle partner, Jay Armstrong, know how to battle these beasts and win?' (Publication summary)
'Beasts have escaped from the Outlands and are back in Beastium. Two beasts are fighting in the ice land.
'New beasts.
'Mega-mutants.
'Will Kai and his battle partner, Will Ritter, know how to battle these beasts and win?' (Publication summary)
'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?' (Publication summary)
'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?' (Publication summary)
