"Billy's new pet hamster is a huge disappointment. Despite his name, Hercules is perhaps the world's laziest rodent. He does nothing besides sleep, eat, and sleep some more. So when Billy sees a commercial on TV for a power snack, he decides that's just the thing to put some hurry into Hercules. But when the formula begins working too well, Billy realizes he may have one huge, hungry problem on his hands"--P. [4] of cover.