When creating a custom book, details matter—especially the spine. While the spine shape may seem like a small decision, it can influence durability, aesthetics, reading comfort, and even certain printing effects. In the world of professional bookbinding, two spine types dominate: the rounded spine and the square spine. Both serve different purposes, and understanding their strengths will help you choose the right style for your project What Is a Square Spine? A square spine features sharp, clean, 90-degree edges, giving the book a modern, rectangular profile. It’s the standard choice for most paperbacks and many contemporary hardcovers. Its primary benefits ...