For SWP and SP, proofreading is a nonnegotiable step, and having our own stable of proofreaders sign off on a final manuscript is part of our quality control. However, we do the proofreading before the book has been laid out into designed pages. Therefore we urge you to review your final laid-out pages VERY carefully, and perhaps even hire an outside proofreader to do a final pass. 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.