Former Owner
- Bibliotheca Philosophica Hermetica1
- Bill Jackson1
- Bill McGrath1
- Bloomsbury Auctions1
- Bodleian Library1
- Boies Penrose II1
- Bonvesino, Marco1
- Boudewijn Willemszoon van Drenckwaert1
- Branners Bibliofile Antikvariat1
- Brick Row Book Shop1
- Bruce Bannerman1
- Brudenell family1
- Budapest University of Jewish Studies1
- Burg Kreuzenstein1
- Burgersdijk & Niermans1
- C.B1
- Caesareum Societatis Jesu Collegium Viennense1
- Camillo Riccio1
- Carleton Rubira Richmond1
- Carlo Archinto, 2nd Marquess of Parona, 3rd Count of Trainate1