Over layout and content of well-designed book is helpful in increasing book sales. Why is that?

Because of good cover design will make a book more interesting, and so intriguing the reader to view its contents.

While the layout of the book is well designed will provide convenience for readers when they read it, and enable them to understand its contents.

Overall, a well-designed book can also be a gift (gift) is exclusive and deserve to be collected.
All of the above have made the book and book cover design, as well as magazines and magazine cover design, into something that is considered by the authors and publishers today.