Publishers
- Karl Prochaska 1
- Katharine Parr 1
- Katherine Tegen Books 1
- Kattenkabinet 1
- Kay Barret 2
- Kaye & Ward 9
- Kaye & Ward Ltd. 24
- Kea Publishing 1
- Kegan Paul, Trench & Co. 1
- Kegan Paul, Trench, Trubner & Co. 3
- Kegan Paul, Trench, Trubner & Co. Ltd. 6
- Keith Reid 1
- Kelly's Directories Ltd. 2
- Kelsey Publishing Ltd 2
- Ken Publications 1
- Ken Trotman Publishing 2
- Kenilworth Press 2
- Kennel Club Books, Inc 1
- Kenneth Mason 1
- Kennikat Press 1
- Kennys Bookshops & Art Galleries Ltd. 1
- Kensington Publishing Corp 1
- Kent & Co. 1
- Kent County Cricket Club 2
- Kenya Railways Museum 1
- Kessinger Publishing 1
- Kestrel Books 24
- Kestrel Railway Books 4
- Kettlewell Transportation Information Trade Services 1
- Kevin Weldon And Associates Pty Ltd 1
- Key Porter Books 1
- Key Publishing 2
- Keyham Books 1
- Kibworth Books 1
- Kimberley's 1
- King's College Cambridge 1
- Kingfisher 1
- Kingfisher Railway Productions 1
- Kingsmead Press 1
- Kingsmead Reprints 4
- Kitchener House-Publishers 1
- Kluwer Academic Publishers 6
- Knight Books 2
- Knightsbridge Publications 1
- Knowledge Publications 1
- Knowledge World 1
- Kober C.F. Spittlers Nachfolger 1
- Kodak 1
- Kodansha International Ltd. 2
- Koeltz Scientific Books 1
- Kogan Page 2
- Konark Publishers 1
- Konemann 3
- Koninklijke Brill Nv 2
- Kookaburra Technical Publications 3
- Korda Developments Ltd 2
- Kosler Verlag Koln 1
- Kozdok 1
- Krause Publications 3
- Krieger Publishing Company 1
- Ktav Publishing House 1
- Kunsthalle Wurth 1
- Kunstsammlung Nordrhein-Westfalen 1
- Kurt Metzner 1
- L. & S. Rexon Of Southwold 1
- L. Mame 1
- L. Miller & Co. (Hackney) Ltd. 1
- L. Tallis 1
- L. Upcott Gill 4
- L.B. Fischer 1
- L.T.A Robinson 6
- L.T.A. Robinson Ltd. 13
- La Mille Miglia Editrice 1
- La Societe Jersiaise 1
- Ladybird Books 7
- Ladybird Books Ltd 3
- Lalit Kala Akademi 1
- Lamplight Publications 1
- Lamson Paragon Supply Company Ltd. 1
- Lancaster University Archaeological Unit 2
- Lancer International 1
- Lancer Publishers & Distributors 2
- Landmark Publishing 11
- Laneman Publishing 4
- Langford Press 4
- Lannoo Publishers 1
- Lansdowne 2
- Lansdowne Press 1
- Lapridge Publications 5
- Larousse 2
- Latimer House 1
- Latimer House Limited 7
- Latimer House Ltd. 7
- Laurels Publishing 1
- Laurence and Bullen 2
- Laurence King Publishing 3
- Laurence Oxley 1
- Lawrence & Jellicoe Ltd. 1
- Lawrence and Bullen 3
- Lawrence And Bullen Ltd. 2