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Literature has the power to unite, inspire, lead and change the world. In this book, Harvard University professor Martin Puchner travels across continents and eras to trace how writing, printing, distribution, and literary forms have shaped history. From the Sumerian epic to the modern concept of authorship, from the first sacred texts to self-publishing, from the birth of the novel to Harry Potter, literature has shaped reality for thousands of years. And our present is no exception.