I have owned these six bookshelves since 2004. I finally decided to line the back of these shelves with four nice wrapping paper rolls from TJ Maxx. The lining was not hard, but the removing the books and putting them back were laborious for me because I neither have strong arms nor hands. I like my lining muted, hence these paper patterns/prints. I have 16 more bookshelves, but I am not lining those. This activity was spring lining for me instead of spring cleaning. The paper rolls were around $15.