We love how they added wallpaper to the back here and a coordinating curtain to tie it all together. This looks like the simplest way. Just take off the doors and add some shelving.
We LOVE the blue and brown in this room. It is so cozy. This is great for a small guest room that doesn't have enough space for a bed and a desk. Turning the closet into office space gives you more room to work with!
Accent headboard wall with wallpaper. This is simply amazing. I wish I had the source for this picture!