At the back of the dining room area you could put a wall-to-wall bookcase filled with books. If you don't have that many books you can have a display bookcase where you place nick backs, a few books, some magazine, sculptures etc.
A platform elevates the kitchen and dining space and adds more tiers to the room. Upstairs you can see there is a home office with built-in shelving. The windows are the highlight and the natural light is expanded by the whiteness of the walls