Saddle Stitching refers to a very popular book binding method in which folded sheets are gathered together one inside the other and then stapled through the fold line with wire staples.

A Copybook of paper for writing that is held together by a wire that curves around and around through small holes at the edge of the paper.

A paperback, also known as a softcover or softback, is a type of book characterized by a thick paper or paperboard cover, and often held together with glue rather than stitches or staples.

A hardcover, hard cover, or hardback (also known as hardbound, and sometimes as case-bound) book is one bound with rigid protective covers