Painted Brick/Enclosed Window Bookcase

Here is my back bedroom that has a painted brick wall. I love it. Great texture. I have polished concrete floors in here (this was once a porch). Have you considered doing concrete with fun broken tiles loosely sprinkled in? I had a house on McCommas that had that and it was fab. I think Michelle Tongate's kitchen in her Hollywood house was like that also.

The bookcase to the right was a window sealed off when the porch was enclosed. I've considered putting doors on it and using it to conceal a flat screen. Would that work for you with the window in the den/library?