Updated: Mar 21, 2019
Book editing refines ideas, catches misused words, and makes sure the grammar is immaculate. As professional writers and editors, we know what book editing takes, and we’re happy to share our expertise with other writers.
Some authors believe their work is more "orginal" or more personal if no one else changes it. So they say 'glow' when they really mean 'shine,' or 'power' when they mean to say 'influence,' or 'effortlessly' when they're trying to say 'admirably.' As you can imagine, this is a potential mine field, preventing readers from understanding what you are trying, but failing, to say.
Good editors (and that's the only kind we use) are people who are obsessive about making sure that what is on the page is what the author meant to say even if he or she lacks the skill to say it. It takes time, education, and a lot of patience. For example, here's a sentence that can mean two entirely different things if punctuated improperly.
"Let's eat grandma."
OR "Let's eat, Grandma."
As the editor who wrote up this example said: "Editing can save lives."