This enables established authors to offer their books again to their audience and enables publication of books that are in public domain. A feature of books on demand that can drive acceptance is the ability to customize the book before printing the book. This customization is often referred to as variable publishing. Users want their names inscribed on the front cover or want a unique cover customized with images or text they choose. Publishers offer users a choice of covers for the book.
Publishers offer users the option to pick and choose which parts of the books they want to print.
If the book is a reference book, users might only want to buy specific chapters. Publishers offer to combine college text book with class lecture notes and materials, which are often referred to as course packs. Users pay the authors to add unique content to books specifically written for the customers. For example, a customer might buy a motivational book for her company and ask that the book be printed with a chapter on the company's history. Many people were familiar with the concept of books on demand.