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.
This elegant cube is the ultimate in well-balanced living – a space-saving design that still offers multiple rooms and peace of mind. The tiny unit has a study with a desk and file cabinet, a staircase with dbuilt-in storage, a book with bookshelves.