Copy editing in an important element to the creation of your book project. Professional copy editors provide an objective set of eyes that thoroughly ensure grammar and spelling are correct, they establish a book language that is suitable and understandable to the readers. Every professional writers know that skipping this stage lowers the quality of the book. That's why it is recommended to hire a professional copy editor to take a second look at your manuscript for this phase. Authors should never copy edit their own work, they tend to be bias therefore unreliable in providing objective criticisms