If a book has an editor, you will be able to find their information in the opening pages of a book before the table of contents or first chapter. This information is often on the copyright information page, although the editor’s name may be listed in the acknowledgements or on the title page instead. If a book has no press or an editor is uncredited, you may need to do some research or contact the author to get editorial information. To contact an editor, contact their publishing company or use their personal or professional website to reach out to them. Remember to always be cordial if you’re planning on a getting a letter or phone call back!
Use the Library of Congress database to find publication information. The Library of Congress is the national library of the United States, and has one of the largest databases of books in the world. Go to https://www.loc.gov/ and click the search bar. Type in the name of the book and the author’s name if you have it. Scroll through the results until you see the version of a book that you’re looking for. Click the title to open the book’s informational page and look for the editor.
Contact the publisher directly by phone or email. The publisher’s website and contact information will likely be printed at the top or bottom of the copyright page. If it isn’t, you can look it up online. Contact the publisher by calling or emailing them to ask about a book’s editor. Publishers keep detailed records on each of their texts, so if anyone would be able to find a book’s editor, it would be them.
Obviously there is a big difference. I actually started with screenplays (with some mild success) partly due to hearing that as long as you have a good story, the grammatical errors won’t be a big deal. Well, that was not true. Maybe if a producer liked the story or I was already established but every contest I entered always came back with feedback about the grammatical errors. Even if I won or placed as a finalist, I always received critique on that. Very little is spelling error, it was more about structure, etc.