You might hire someone for a proofread, but let the editor know that you’re open to hearing from him or her if the work needs a heavier edit. The editor would need to present you with evidence in the form of sample pages that showcase what’s needed—and your job is to make sure you agree. You want to feel like an editor’s edits are polishing your work and making it shine. If you feel dread or anger, or even if you feel misunderstood, it’s likely not a good fit. At the very least you want to share your reactions with the editor so they can respond or change course.
Having your manuscript reviewed by a professional book editor is a rewarding experience. In addition to the improvements to your manuscript, you will also benefit from the feedback on your writing that only a finely tuned professional editor can provide. Writers often comment on the lifelong benefits enjoyed from their very first editing experience. If a writer wants to ensure they are creating an impactful and enjoyable reading experience for their readers, then editing is a no-brainer. Remember nothing is more damaging to your author brand that publishing a book with embarrassing typos and grammatical errors. Read more.
Regarding your last question, I know of no editor who gives a money-back guarantee for occasional errors that happen to slip through or for a different opinion by a later editor. I’m afraid such things are just the nature of the publishing beast. But by having a shorter portion edited first, you will get a decent feel for whether someone is the right editor for you, and will be able to be confident in his or her work on your entire book.
Working with a professional editor can be one of the most rewarding experiences in an author’s life. You’ll probably learn more about the craft of writing — plot, characterization, dialogue, worldbuilding… — than if you took an creative writing course. However, as is always the case in creative endeavours, critique can be hard to accept. This is why you should seek an editor who’s not only experienced in their field, but whom you’d feel comfortable receiving feedback from. In the words of one of our Reedsy editors:
Hey there! In my experience (as a freelance developmental fiction editor with friends in the same profession), developmental is actually the cheapest option–I think you may have made a decimal point error 🙂 The going rate in my corner of the edit-verse is around $0.008/word, not $0.08, which means a 70,000-word edit will be $560 or so. It’s possible this is different across genres, though! Just wanted to drop a note so any aspiring budget-minded fiction writers out there can take heart .
For my book, Career Change, I gave an early copy to people working in my department in the day job who I knew were dissatisfied with what they were doing. They came back with questions and suggestions for what to include as additional material. For The Healthy Writer, we asked medical doctors to read it as a sense check (even though my co-writer, Euan Lawson, is a doctor!)
Genre – If you’re a nonfiction author, your best bet is to choose editors who understand the structure of good nonfiction books; they know what works and will keep readers happy. If you’re a fiction author, select a fiction editor who is passionate about those stories and knows what readers of your genre are looking for. Choosing an editor within your genre is especially important for developmental editing.
I cannot speak for all editors, of course, but I know I and many of us would be open to editing just part of your book at first, say, a particular chapter or two that you sense needs a lot of work. That is often enough to show you mechanical errors that you tend to make repeatedly. You can then go through the entire manuscript yourself looking for as many of the same kind of errors as possible. You will sharpen your basic writing skills in the process, and it will pay off in all future projects.