Former Owner
- Biblioteca Trivulziana1
- Biblioteca civica di Verona1
- Biblioteca del Seminario Arcivescovile1
- Biblioteka Tulezynska1
- Bill McGrath3
- Bill Ward1
- Birch & Son1
- Birgittinessenklooster Mariënwater1
- Bloomsbury Auctions7
- Boies Penrose2
- Bonaventura Brem1
- Bonhams & Butterfield1
- Brayton C. Ives3
- Brian Douglas Stilwell1
- Brick Row Book Shop1
- Bridget Hunt1
- Bridgewater Library1
- Bruce Bannerman1
- Bruce P. Ferrini9
- Brunori Cadamosto1