Jack and Annie are having their scariest adventure yet: on the Amazon river! They are surrounded by army ants, jaguars and piranhas, vampire bats, snakes and crocodiles! And they?ve got to find another clue to help rescue Morgan, the missing owner of the Magic Tree House. For a while, Jack and Annie are worried that they might be stuck in the rainforest forever! Luckily, the cheeky monkey they meet turns out to be friendlier than he first seems