The perfect binding method starts with printed pages which are compiled, folded, and assembled into the correct order. Groups of pages are called signatures in the printing world.
The first and last pages are then glued onto a bigger sheet that becomes the front and back cover with the signatures stacked together making the inside pages. The binding edge is then primed with a thermal glue to act as the spine. Once the pages are together at the spine, the sides of the book are trimmed to create a finished look which is why it’s called a “perfect” book. The edges are cut uniformly, or perfectly, which is not always the case with traditional hardcover books.
This type of book printing is a professional way to present products or services.