This book feels more like a course than a textbook. The text reads like what a professor would tell you at the classroom, except it's in book form and accessible to everyone.
On a side note, considering the time this book was published, its 'Biographical Notes' section felt like a journey back in time. Only the birth dates of authors such as Sherwood Anderson, Ernest Hemingway, and Flannery O'connor were mentioned, without dates of decease.