When formatting your book and e-book, start with a clear structure, including title, chapters, and consistent headings. Use readable fonts like Times New Roman (print) or sans-serif (e-book) with a standard font size (12pt for print, adjustable for e-books). Ensure proper line spacing (1.5 or double for print, single for e-books) and justified alignment for a professional look. Add page numbers for print books and clickable table of contents for e-books. For ebook editing, check formatting consistency, hyperlinks, image placement, and readability across different devices.