What is spine in book design?

The spine in book design is a crucial yet often overlooked element, serving as the literal backbone of a publication. It not only binds the book together but is also a canvas for artistic expression. A well-crafted book spine design ensures visibility on shelves, conveying essential information like title and author. Consider the aesthetic harmony between the cover and spine, creating a cohesive visual identity. Book spine design isn't merely functional; it's an art form, a subtle yet impactful detail that beckons readers from afar, inviting them to explore the treasures within the pages.