What does paperback mean?

Answer 1

A "Perfect Paperback" simply refers to the binding process .It has nothing whatsoever to do with the book's condition.It's a type of binding often used for paperbacks where the spine is glued. Since it's the most commonly used sort of binding for paperbacks, chances are there's no difference between the two assuming it's a recent book.

Perfect (paperback) binding is very popular and clean looking, this type of binding suits books from 70 pages or more. Three sides of the book are guillotined after binding to give a sharp edge. It is the larger size paperback. But there is really no exact size it will be but it will most likely be similar in size to a regular hardcover. It will be bound on nicer paper than a mass market paperback(Romance novels in the supermarket are mass market). Also it is much more sturdy than a mass market paperback.