After seeing some amazing looking books, I because self-conscious of my own bookshelf. Don't get me wrong, I have a number of books with gorgeous covers. However, seeing these made me crave gorgeous, unique, themed books.
I used this site to get me started on my book covers. The site shows you how to cover a composition book with strips of fabric. I simply used it for it's pattern. Choose whatever fabric you love and follow the directions.
Here is mine.
Or you can choose a plain fabric and make your own pattern with stamps. I also used stamps along the spine to spell out the title and the author's name. I love this stamp I found on Etsy. It would look gorgeous printed in a jewel-toned ink on tan canvas.
I love these printable bookplates I found on Love.Obsese.Inspire. Download them here. I printed them onto cardstock and used rubber cement to glue them to the inside cover.