Perfect bindings refer to a type of book binding technique used to bind paperback books. It is a popular method of cost-effective and efficient book binding that involves gluing the book cover to the spine of the book block. There are several synonyms for perfect bindings that can be used interchangeably, including thermal binding, adhesive binding, and softcover binding. Each of these synonyms refers to the same type of binding technique, but they may be used to describe different variations or processes of the binding. Regardless of the synonym used, perfect binding is a durable and aesthetically pleasing method of book binding that is widely used across the publishing industry.