bookcase(furniture displaying books) noun [UK: ˈbʊk keɪs] [US: ˈbʊkˌkes]John built a bookcase. = John costruì una libreria.
bookshelf [bookshelves](shelf for storing books) noun [UK: ˈbʊk.ʃelf] [US: ˈbʊk.ˌʃelf]We have neither a wardrobe nor any bookshelves. = Non abbiamo né un armadio né una libreria.
bookshop(shop that sells books) noun [UK: ˈbʊk.ʃɒp] [US: ˈbʊk.ˌʃɑːp]Where is your father's bookshop? = Dov'è la libreria di tuo padre?