Former Owner
- Bibliotheca Beggadorum1
- Bibliotheca Philosophica Hermetica1
- Bill Jackson1
- Bill McGrath1
- Bloomsbury Auctions1
- Bodleian Library1
- Boies Penrose II1
- Boudewijn Willemszoon van Drenckwaert1
- Branners Bibliofile Antikvariat1
- Brayton C. Ives3
- Brick Row Book Shop1
- Bridget Hunt1
- Bruce Bannerman1
- Bruce P. Ferrini9
- Brudenell family1
- Budapest University of Jewish Studies1
- Burg Kreuzenstein1
- Burgersdijk & Niermans1
- Burndy Library3
- Buxheim Charterhouse9