Unlike most books published today, Library of America volumes bend all the way back without cracking the spine or endangering the binding. Series volumes feature Smyth-sewn binding, the most durable—and the most expensive—commercial process available. In addition, two pieces of material are added to reinforce the spine of each book. If you bend a book all the way back, you’ll see the piece of “crash” (a gray, heavy-duty Kraft paper). Hidden underneath the crash is a wrap of “super,” an extremely strong and very flexible open-mesh fabric affixed with adhesive to the front and back case, to the endsheets, and to the sewn-together signatures. Note how the edges of signatures stay perfectly aligned while the cloth of the spine bends in an optimal “semi-round” shape.

Most publishers save money in the printing and binding process by arranging the pages on the sheet perpendicular to the direction that the roll of paper travels through the press. The Library of America requires that the pages be printed in the direction of the paper’s grain. “Printing with the grain” keeps the binding from crackling when the book is opened (you can actually hear the difference), ensures the durability of the binding, and allows the book to lie completely flat.