When a work of fiction or nonfiction captures the attention—and wallets—of American readers, it speaks volumes about the nation's cultural climate. Best-selling books have played a critical role in influencing the tastes and purchasing habits of American readers for more than 100 years. Weekly best-seller lists appear in various national newspapers. Nationwide reading clubs help propel books (and authors) into mass popularity. Strategic marketing campaigns help embed the importance of a particular work in the American public's consciousness.