Proofreading is the last stage of editing —the final check to ensure your book is error-free before it goes to print. It’s the step that comes after your manuscript has been professionally laid out by a book interior designer and just before your book is published or ready to be printed for sales. Reality Check #1: Proofreading does not replace other forms of editing. Every book—no matter how many rounds of editing it has gone through—needs a proofread. Never skip the proof