Are print books and digital books pretty much the same thing? In a short, stirring documentary video called “The Story of the Book,” British booksellers Adrian Harrington and Jonathan Kearnes talk about “some of the key points of the book as a physical form,” taking down their first editions of Dickens, Kipling, and J.K. Rowling to illustrate their argument that the format they refer to as “the real book” is unique and irreplaceable.