I see a lot of "almost" bookshelves. They hold books and look "design-y" but they waste energy and space. If you are really into books, it's not about the cute shelves. It's about the books. Make that space hold as many as it can.
I like how the composition and quiet green gray wall color draws you into this interior still life photograph by Lerkenfeldt Photography. Multiple green tones and subtle pattern in the draped wallpaper.