Maybe this in the basement but instead of a window a fireplace with a seat. Frame a window seat with built-in bookshelves. Now books are just an arm's length away when homeowners want to curl up on the window seat.
Make it yourself desk. Two ikea expedit 4 shelf organizers and a cut to fit sheet of melamine board. liquid nails and good day- 120 dollar oversized custom desk. IDK if I'd use IKEA stuff. Maybe the drawers & such from Target.