Thanks Carole, yes we are very keen to knock out that wall - I have to be restrained from bringing the sledgehammer inside until we get a proper load-bearing beam organised! Once thats done and the books are off the floor and on the wall opposite we will have to think of rearranging this space - I still like it split up by a couch, but perhaps we could put a larger dining table in the new space.

I would use a bookcase unit with closed doors on the lower half and not too high. Wide and low maybe. Closed lower cabinets are great for toys, games and will not clutter. Open shelves tend to get cluttered after a while. When displaying books, use in stacks standing and lying down. Open space between groupings, not all lined up in rows. Add some decor items sprinkled among the books to give the eye a visual break. I would choose a horizontal art piece for the chair wall. Add some art on the long TV wall leaving a lot of bare wall between the TV . and the artwork between the corners of the chair wall and the window wall.

I think your original idea to put the TV on the wall between the sliders was correct. I don't think a TV ever belongs in front of a window. After you move the TV, put the two chairs closer together under the window with a table between them, and rotate the sofa to face the TV. You may have to angle the TV (but not the TV cabinet) toward the seating for viewing, but I think it will be a more satisfactory arrangement for you.

Well, for lack of a better idea, since you find it a drafty little space. I'm assuming the draft comes in on the right? Most of the necessities in the area are located of the left side; i.e. vent, thermostat, light switch etc. What I would do I think is caulk up the drafty spots, maybe even add sized poster board wrapped in batting I covered in a gorgeous fuscia with diagonal grosgrain ribbons every which way covered with a heavy velvet to be attached to the area above & below the window. (Of course remove the drapes that are hanging in there). This for the purpose of using it as a pin-it board for notes. Attach a table height board covered in felt to carry across the full width of the little room. Leaving just enough space for a comfortable little antique desk chair. Paint the back wall a bright cobalt blue, paint the ceiling a silvery pearlescent white. Find a way to attach a clip-on task lamp. And stretch a heavy duty enough wire across the top of the opening and complete it with a heavy doubled velvet drape with a drooping valance. Place a swag with fringe & jewels on it to be closed when not in use. Voila intrigue is yours!