If you have enough books you may not even need an actual bookshelf for this to work. Seriously. Just take a look at the wildly creative headboard made entirely out of books and nothing else found on We Heart It.
Soon you will find this single wall morphing into the focal point of your bedroom as everything from inspirational quotes to funny doodles start taking shape on it.
For bedrooms that lack enough wall space a plain old bookshelf used as a headboard is one of the best ways to combine two pieces of furniture into one.
Of course even if your bedroom is huge you can still follow this trend. Try combining three narrow bookshelf units to make a large one along an entire wall like this arrangement featured on BHG.