Maybe nail shelves to the back of bookcases for more book storage?
Monkey curtain tie back cotton yarn crochet monkey by Aeerdna
Materials: KNUFF Magazine file set I have found this idea on one czech website, Napadyproanicku. You need three pieces of Knuff magazine files, wooden blocks, hot glue gun. Magazine files and block (Diy Furniture Redo)
Love the idea of a birdhouse night light Avery Wall Hanging Birdhouse Lamp Modern by moderntreetopbaby