When Leonard takes a shortcut through the park, he finds an egg and takes it home, where it hatches into a lizard (or so Leonard thinks). Leonard names his new pet Buster and takes him all around the city: on the subway, to the library, to a baseball game, and more.

But Buster keeps growing and growing--and Leonard gets the sense that Buster is longing for something Leonard can't provide.

Before long, Buster becomes too big to keep, and Leonard realizes he needs to set Buster free. So Leonard comes up with an inventive plan, one that involves all the balloons Leonard can find and the annual Thanksgiving parade, in an imaginative plot twist that will spark readers' imaginations--and touch their hearts.