It may not seem like something to consider. Paperback vs hardcover book covers. However, there are few things you should think about when designing for these kinds of books. Does the author expect to sell more hardcover books (usually meaning in physical book stores). It can also be a presentation for coffee table books. Blurb.com is a great source for creating this type of book. You do it all online as long as you have the high resolution photos necessary for print.
Hardcover books are also used in academic publications such as textbooks because they need to be much more durable than paperback, although you’re starting to see fewer because they have become so cost driven and hardcover makes in more likely these books will be resold to future students, impairing additional sales. Paperbacks simply do not hold up to the rigors of being carried around in a backpack for three months and thrown around a dorm room or study hall.
Paperback or Hardcover
Paperback books that are good enough to be sold in a physical bookstore are bound using Perfect Binding. Any decent self-publisher uses perfect binding for paperbacks. Avoid those that don’t. A lot of the of companies offer hard cover binding options, but so far it is still pretty expensive to do as a self-publisher, regardless of your chosen book cover art. As nice as they are, it’s pretty much impossible to make any profit on them because your printing cost end up being so high that nothing is left for royalty payments. Additionally, the retail price is often required to be unreasonably high—same goes for full color books. The best money making strategy is black and white paperbacks.