Former Owner
- Biblioteca del Seminario Arcivescovile1
- Biblioteka Tulezynska1
- Bibliotheque Seminaire de Notre Dame de Puy1
- Bill Jackson1
- Bill Ward1
- Birch & Son1
- Birgittinessenklooster Mariënwater1
- Bodleian Library1
- Boies Penrose1
- Boies Penrose II1
- Bonaventura Brem1
- Bonhams & Butterfield1
- Breslauer and Meyer1
- Brian Douglas Stilwell1
- Brick Row Book Shop1
- Bridget Hunt1
- Brudenell family1
- Brunori Cadamosto1
- Burgersdijk & Niermans1
- Byron Reed1