The romantic myth of an author sitting alone in their room and emerging with a finished book is just that: a myth. Writing is a tough skill to master. Good books are the product of talent, craft, revision, and more revision. Like all creative arts, writing requires critique from knowledgeable professionals who can make suggestions and provide direction from a perspective most writers can’t obtain on their own. From developmental editing — with advice on story and structure — to copy editing and proofreading, working with a range of book editors is absolutely crucial when writing a book.