Former Owner
- Bartholus Blancellus1
- Beatrice de Fouar1
- Beauvais Cathedral1
- Benetto Spinelli1
- Bernard M. Rosenthal1
- Bernardo Bembo1
- Betty Freudenheim1
- Biblioteca Trivulziana1
- Bill Jackson1
- Brayton C. Ives1
- Brian Douglas Stilwell1
- Brick Row Book Shop1
- Byron Reed1
- C Traylen Bookshop1
- C. Duca Visconti Modrone1
- C.B1
- Carl Hermann Grabauer1
- Carlo Archinto, 2nd Marquess of Parona, 3rd Count of Trainate1
- Caxton Club1
- Charles Brodrick1