Window Seat and Wardrobe. Get some already built wardrobe units (IKEA ones used here). Build a bench to put in between. Attach a shelf up top. Then caulk and paint, and you have what looks like a custom built piece...but for much cheaper!
a library anyway you can get it =) http://twenty-eight-0-five.blogspot.com/2011/11/library-space.html
I wouldn't mind having this blue and green study with window seat in my office. Let's make it happen, cap'n!