This is a perfect combo of my two favorite ideas for that space under the stairs leading to the basement. A reading nook AND book storage and shelves . assuming that there is enough space for this there.
The Infinite Staircase sculpture titled Umschreibung was designed by Olafur Eliasson. The staircase can be found at the entrance of the KPMG office building in Munich, Germany. Photo taken by Christian Krieglsteiner.