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.
I want to do this for my kids to make reading exciting - for every stair, we'll read the book. Staircase to Knowledge by sungazing: Stairway to the reading room at The Magic House, St. Louis Children's Museum in Kirkwood, MO