Publishers
- Joseph Williams Limited 1
- Joseph, Myers & Co. 1
- Joshua Morris Publishing 1
- Journal Of Roman Archaeology 1
- Journal-Verlag 1
- Jr Marketing 1
- Judy Piatkus (publishers) Limited 2
- Julia MacRae Books 14
- Julian Messner Inc. 1
- Julius Springer 4
- Juniper House Library 1
- Juvenile Productions 2
- Juvenile Productions Ltd. 28