Book publishing services are usually just self-publishing companies that do the legwork for a fee. But in a nutshell, the publishing industry includes the development, marketing, production and distribution of news and non-fiction magazines and books, literary works and other works dealing with dissemination of information. Although newspaper and magazine companies often own printing presses and binderies, most of the book publishing companies outsource the production and development work to smaller companies and only control the advertising and marketing tasks. Some of the publishing companies sub-contract the editorial work as well. These companies offering specialized book publishing services are also an integral part of the ever-growing publishing industry in the US.