I told Kim a few weeks ago that she didn't have enough book storage to really pull off a cool design look using books. (see this post)
I came across this photo today- (designer Jason Oliver Nixon) and thought- now here is an example where there is a large enough quantity to have the books look great. I also love the incorporation of decorative elements sprinkled throughout. Notice too the area above the bookcase. This is sometimes an area where people tend to struggle.
I also liked the cluster of wall decor. The variety is terrific- with common elements of sepia tones and red.
The third thing I would like you to notice in the photo below is the wall color. Dark brown works great here. Dark brown, in my opinion rarely works great. But I like it here.