There are so many kinds of book covers available in Japan. Paper, fabric, leather It seems that many Japanese like to cover their books with another piece of wrapping.
I love their wrapping designs, and most of the time, even book stores give out free paper book cover wrapping when you purchase a book. Some people like to use their own wrappings at home though.
This one is my kokeshi stamp book cover design. I love kokeshi (Japanese wooden traditional dolls originated from Tohoku) and I never get tired of them. So I created a book cover for myself, to encourage more reading (I suppose?).