What’s hard about writing a good book is keeping the quality consistent. All too often, when we write our first draft, the quality of our content and writing vary between chapters and sections. Although it can be avoided through solid writing foundations, it’s not completely abnormal. Writing is a difficult task, and writing well is even more so. But that’s why you should always have people to review your work—whether or not they’re professionals. The more pairs of eyes, the better. These people may not know how to fix the issues in your book, but they can at least point them out. You can also work with a professional writer to make sure your book is consistent. If the quality of your book isn’t consistent across the whole book, you risk letting down your readers.