Publishers
- Air-Britain (historians) Ltd. 56
- Airfield Publications 1
- Airlife 47
- Airlife Publishing Ltd 11
- Airline Press Of California 1
- Airline Publication & Sales 1
- Airways International Inc, 1
- Alain De Gourcuff Editeur 1
- Alan Sutton 31
- Alaska Northwest Publishing Company 1
- Albany Books 1
- Albatros Productions Ltd. 3
- Albemarle Gallery 1
- Albert E. Marriott 2
- Albert Whitman & Company 1
- Albertelli 1
- Albion House 1
- Albyn Press 1
- Alden & Company Limited 1
- Alden Press 1
- Aldus Books 1
- Alec Tiranti 1
- Alecto Historical Editions 2
- Alex Hogg 1
- Alexander Gardner 3
- Alexander Maclehose & Co. 1
- Alexander Moring Ltd. 1
- Alexander Ouseley Ltd. 1
- Alexander Strahan 2
- Alf Cooke Ltd. 6
- Alfred A. Knopf 8
- Alfred A. Knopf, Inc. 2
- Alfred Mame Et Fils 1
- Alison Green Books 3
- Alison Hodge 2
- Alister Taylor 1
- Allan North 1
- Allan W. Stobbs 1
- Allan Wingate 1
- Allen & Unwin 1
- Allen Figgis 1
- Allen Lane 7
- Allenson & Co. Ltd. 1
- Allied Newspapers Limited 2
- Allison & Busby 1
- Allyn & Bacon 1
- Allyn and Bacon Inc. 1
- Almark Publishing Co. Ltd. 1
- Alpha Science International Limited 1
- Alpine 1
- Alpine Fine Art Books Ltd. 1
- Alpine Fine Arts Collection 1
- Alpine Publications, Inc. 1
- Alula Press 1
- Amazon Publications 2
- Amber Books 2
- Amber Books Ltd 1
- Amberley 11
- Amberley Publishing 19
- American Institute Of Architects 1
- American Institute Of Chemical Engineers 1
- American Iron And Steel Institute 1
- American Mathematical Society 6
- American Society Of Agricultural Engineers 1
- Amex Company Ltd. 4
- Amiot Dumont 1
- AMMO 1
- Amstrad 1
- Amulree Publications 2
- Anastasios G. Leventis Foundation 1
- Ancient And Honorable Artillery Company Of The Masschusetts 1
- Ancient Order Of Foresters 1
- Andersen Press 43
- Andersen Press Ltd. 14
- Andersons-Edinburgh-Limited 2
- Andre Deutsch 32
- Andre Deutsch Children's Books 1
- Andre Deutsch Limited 5
- Andred Publishing 1
- Andrew Dakers Limited 2
- Andrew Reid & Company Limited 1
- Andrew Spottiswoode 1
- Andrews & Co. 1
- Andrews McMeel Publishing 2
- Angling Publications 2
- Angus 1
- Angus & Robertson 8
- Angus & Robertson Ltd. 3
- Angus & Robertson Publishers 4
- Anne Williamson 1
- Annual Concepts Limited 7
- Annual Reviews Inc. 1
- Anstalt 1
- Ant Belmont 2
- Anthony Blond 2
- Anthony Nelson Ltd. 1
- Anthroposophic Press 1
- Antique Collectors' Club 8
- Antonio Delfino Editore 1
- Anuart Ediciones 1