Publishers
- K. & R. Books Ltd. 2
- K. Rimell 1
- Kaisei-Sha Co. 1
- Kalmbach Books 1
- Kangaroo Press 3
- Karl Baedeker 1
- Karl Prochaska 1
- Katharine Parr 1
- Kattenkabinet 1
- Kay Barret 1
- Kaye & Ward 11
- Kaye & Ward Ltd. 25
- Kea Publishing 1
- Kegan Paul, Trench, Trubner & Co. 2
- Kegan Paul, Trench, Trubner & Co. Ltd. 5
- Keith Reid 1
- Kelly's Directories Ltd. 4
- Kelsey Publishing Ltd 2
- Ken Publications 1
- Ken Trotman Ltd. 1
- Ken Trotman Publishing 3
- Kennel Club Books, Inc 2
- Kenneth Mason 1
- Kennikat Press 1
- Kensington Publishing Corp 1
- Kent & Co. 1
- Kent Archaeological Society 1
- Kershaw Publishing Company Limited 1
- Kessinger Publishing 1
- Kestrel Books 26
- Kestrel Railway Books 4
- Kettlewell Transportation Information Trade Services 1
- Kevin And Kay Patience 1
- Kevin Weldon And Associates Pty Ltd 1
- Key Porter Books 2
- Key Publishing 2
- Kibworth Books 1
- King's College Cambridge 1
- Kingfisher 1
- Kingfisher Books 1
- Kingfisher Railway Productions 1
- Kingsmead Press 1
- Kingsmead Reprints 4
- Kirklees Leisure Services 1
- Kitchener House-Publishers 1
- Kluwer Academic Publishers 6
- Knight Books 3
- Knightsbridge Publications 1
- Knowledge Publications 1
- Knowledge World 1
- Kober C.F. Spittlers Nachfolger 1
- Kodansha International Ltd. 3
- Kogan Page 2
- Kohler And Coombes Ltd. 1
- Konark Publishers 1
- Konemann 5
- Kookaburra Technical Publications 1
- Kosler Verlag Koln 1
- Kozdok 1
- Krause Publications 3
- Ktav Publishing House 1
- Kunsthistorisches Museum Wien 1
- Kunstsammlung Nordrhein-Westfalen 1
- Kurt Glemser 2
- Kurt Metzner 1