There are two different types of covers that are available at Adibooks,
softcover and hardcover. Softcovers are printed on a fairly rigid
coated paper pretty much similar to that found on paperback books
at your local bookstore. Hardcover covers are created differently.
With hardcovers, your design is printed on a gloss paper and wrapped
around a cardboard material. Both softcover and hardcovers must be
designed in a particular way.