Former Owner
- Biblioteca del Seminario Arcivescovile1
- Bibliotheca Philosophica Hermetica1
- Bill Ward1
- Binyamin ben Salem Elark2
- Birch & Son1
- Birgittinessenklooster Mariënwater1
- Blenheim Palace1
- Bodleian Library1
- Boies Penrose1
- Boies Penrose II2
- Bonaventura Brem1
- Bonvesino, Marco1
- Boudewijn Willemszoon van Drenckwaert1
- Brahmānaṃdatīrtha1
- Branners Bibliofile Antikvariat1
- Brayton C. Ives3
- Breslauer and Meyer1
- Brian Douglas Stilwell1
- Brick Row Book Shop1
- Bridget Hunt1