A shelf or case for storing books. Often used in libraries, studies, or bookstores. Slightly more formal than 本棚.
Many books are lined up on the library bookshelves.
He took a novel from the bookshelf.
Compound of 書 (sho, 'book' or 'writing') and 棚 (tana, 'shelf'). The reading しょだな follows standard rendaku voicing of たな to だな.