Former Owner
- Battista di Ser Cicco di Fermo1
- Benjamin Heywood Bright1
- Benjamin ben Salem Elark1
- Bern Dibner1
- Bernard Quaritch1
- Bernard Rosenthal1
- Bernardi1
- Bernardo Mendel1
- Bhacaṃbhat1
- Bhatta Narayana1
- Bhauruji, Pandit1
- Bhaṭṭaśivākānta Lakṣmīkānta1
- Bhaṭṭaṃbhaṭṭa1
- Bhālacandra Gaṇeśa1
- Bibliotheca Philosophica Hermetica1
- Binyamin ben Salem Elark1
- Boies Penrose II1
- Brahmānaṃdatīrtha1
- Bridget Hunt1
- Bridgewater Library1