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.
Tips for Arranging & Organizing Bookshelves Doorway Savvy Built-in bookshelves surrounding a doorway can be tricky; start by filling the top row with books. Alternate the remaining nooks with creatively stacked books and accessories.