Like many great successes, Watership Down began as a sort of accident. Richard Adams was driving his family to a production of Twelfth Night when his daughter asked him to tell a story. Put on the spot, he began with a humble sentence: “Once upon a time there were two rabbits, called eh, let me see, Hazel and Fiver, and I'm going to tell you about some of their adventures.” Soon enough, the invention of an entire world would follow.