The flying beaver brothers and the birds vs bunnies

Ace and Bub's plans for a quiet vacation are put on hold when they are stranded on an island where their nemesis, Walter, has stirred up trouble between the birds and the rabbits.

Ace's and Bub's plans for a quiet vacation are put on hold when they are stranded on an island where their nemesis, Walter, has stirred up trouble between the birds and the rabbits. Book #4