I participated in my online group's annual book project swap this year. The book could be any size but had to have more than twenty pages and most of the pages decorated somewhat.
I gutted an old, unused journal and made a traveler's notebook style book. Instead of using elastics for the traditional spine I sewed the signature in with the three-hole pamphlet stitch. To cover the stitching and the original cover, I glued on a piece of handmade paper with floral bits that I have had forever. The inside cover (which you can see in the second photo) was too pretty to cover up. The "theme" of the book is botanical - flowers, herbs, toadstools, butterflies and birds.
This is the cover with added metal corners and a lovely green ribbon tied around for the closure.