Semantic structure: Using Styles in editing, book design, and ebook formatting Ebook Design, Editing, Print Book Design / By Laura Lis Scott Say what you mean. It’s so simple in books, right? If it’s an important idea, bold it. Or maybe italicize it. If it’s a section header, make it big. Chapter title, make it really big. That’s all there is to it, right? Not quite. Not anymore.