The book, The Beggar's Opera; to Which is Prefixed the Musick to Each Song, has been considered important throughout the human history. Beggar's Opera is a tongue-in-cheek drama from the 18th century about a bunch of low-lifes who constantly try to make money at each other's expense. The funniest plot line is that of the dastardly Captain MacHeath and his two paramours, Polly Peachum and Lucy Lockit. Polly is the daughter of the head of the local criminal gang, and Lucy, the daughter of the jailer. (Amazon)