A custom paperback, also known as a softcover book, is made by wrapping the book block with a durable, flexible paper cover and securely gluing the spine to create a strong, unified structure. In production, multiple folded signatures are gathered and bound into a book block, then covered with a soft paper cover before being trimmed to the final size. Paperbacks generally come in two styles—standard paperback and French flap paperback—and are widely used for books, magazines, and catalogs because they offer an ideal balance of durability, affordability, and professional appearance.