There are different types of book publishing, two of which are Corporate Publishing and Self-Publishing. In Corporate Publishing, an author submits a manuscript to a publishing house. If the manuscript is accepted, the publisher takes responsibility for the production of the book. The publisher provides the money for editing, typesetting, designing, printing, binding and marketing. The publisher also bears the financial risk and pays the author royalty according to their agreement. In Self-Publishing, the author also takes the manuscript to a publishing house but pays for the production of the book. After collecting the finished copies, the author takes responsibility for marketing or distributing them and therefore bears more financial risk. 

Role of a Book Publisher
The role of a book publisher is to turn an author's manuscript into a finished book and make it available to readers. The publisher receives and assesses manuscripts to determine whether they are suitable for publication. The publisher also supervises the editing and correction of the manuscript, as well as the design, typesetting, printing and binding of the book. After production, the publisher is involved in marketing and distributing the book so that it can reach its intended readers. In this way, the publisher connects the author and the reading public. � �