Tiger in Trouble by Eric Walters

In this sequel to Eric Walters's bestselling Tiger by the tail, Sarah and Nicholas Fraser set off to spend a week at zoo camp, compliments of their absent father. Initially reluctant to leave Mr. McCurdy and his menagerie of exotic animals behind, they resolve to make the best of it when they discover that this is their mother's big chance for a vacation of her own. Once they arrive at the airport, however, they quickly learn that the camp is not what it seemed.