Window seat with built-in bookshelves. Could use IKEA: Hemnes daybed kitchen pullouts each), and Billy bookcases each or with uppers each). Total cost with knobs, trim, paint, etc. would be about The skylight is a nice touch too!
A wall mounted desk is such a space-saver. Multi-functional, convenient, and also simply trendy it can aid you create an useful home office in a snap. Its significant benefit over a regular desk is that it does not take up a great deal of precious area.