Also on these boards
Your sofa doesnt have to be exactly on the wall, look at all the great display space you could have! I even see the rail for a library ladder there.
I took pictures while our house was being built and I know where all the dead spaces are in the house (and there are a lot of them) I want to do this or similar to take advantage of the empty unused spaces! Distinctive built-in bookcases use the space beneath the extra-wide staircase.