It truly is one of the easiest ways to give your print paperback a professional look: incorporate your cover fonts in the interior pages. If you’ve designed your own cover, you already have those fonts installed on your computer. If you’ve hired an outside designer, simply ask where you can purchase the fonts yourself. (The designer most likely purchased a single seat for the font, or the rights for only one user.)
Great places to include your cover fonts:
Title Page (it’s always nice mimic the actual layout of the title on the cover)
First Lines of Chapters
Page Headers (especially if you’re including the title of the book in the header)
When cover fonts are incorporated in a book’s interior, they can offer a really nice feeling of continuity, break up the sea of text in a novel, and create an overall polished piece.