Shelves are meant for decorating and @craftedsparrow knows just how to do it. Using 12 gold accented Target decor pieces this bookcase gets an upgrade. Inspiration awaits here: http://www.thecraftedsparrow.com/2015/04/helpful-tips-for-styling-bookshelves.html
Bookshelf design trick: "Provide visual interest by arranging some books horizontally," says @Eddie Ross. "You can also place accessories atop the stacks." Coating the built-in unit's interior with a pale blue adds depth.