Proofreading is a nonnegotiable step, and it’s included in our publishing package. We have our own stable of proofreaders we work with and a process that’s delineated in our Author Handbook.  We do the proofreading before the book has been laid out into designed pages. As such, we urge you to review your final laid out pages very carefully, and if you choose to hire an outside proofreader or a trusted friend to do a final pass, please be advised that we will only consider changes that are actual errors, and not discretionary editorial changes. We have a thorough checklist of things to watch out for when you receive your first designed pages, but it’s never going to hurt to enlist more help and get another final set of eyes on your final product. Also, if you’re up for it, we recommend doing a final out-loud reading of your own book once it’s in ARCs. There’s no better way to catch errors than to read your work aloud.