Henry and the Crazed Chicken Pirates

Henry and his bunny friends have a great life on an island shooting each other out of cannons and reading books until the note comes. It's a message in a bottle that floats up and it says, 'We're coming to steal all yer loot.' And it's signed, 'yer worst enemies.' Henry is very worried. He starts to read up on impending doom and then began to write his own book. Then, it happens. A hot-air balloon filled with crazy chicken pirates lands on the island. What can be done to stop them?