/Long Stitch Binding
With a Long Stitch binding, the sections are sewed onto the cover. This makes the thread visible on the outside of the spine. If this binding method is used with flexible cover-material (usually leather) it’s often called a Medieval Limp Binding. If this binding is used with only one section, it’s called a pamphlet binding. A leporello binding has single signatures bound with a pamphlet stitch on the peaks or valleys of a cover folded like an accordeon. All of the above are placed in this category.