Or instead of building the unit around the bed just pick up a couple of bookshelf units from IKEA and place your bed directly in front of them like this gorgeous example featured on Brit + Co which has a very strong library feel to it.
Got a twin bed? No problem — bookshelf headboards are great for kids’ rooms student dorm rooms and even guest rooms! Just grab a more narrow bookshelf that makes a better fit for a smaller bed like these two examples from Small Rooms on Tumblr and Susanna Carter on Pinterest.
Plush bedding is the next step forward as this is a style that encourages cozy comfort. A safe way to start is by first choosing the bed and then working around it by bringing in matching side tables lighting fixtures and accessories.
And instead of walls you can also turn to the headboard closet doors or even the bedside table for chalkboard beauty. Decor clad in chalkboard paint can be moved around to a different room if needed making them far more resourceful than those accent walls.