Publishers
- Aip Press 1
- Air Britain 2
- Air Force Association 1
- Air Force History & Museums Program 1
- Air Museum Publications (york) Ltd 1
- Air Research Publications 1
- Air Review Ltd. 3
- Air University Press 1
- Air World 1
- Air-Britain 10
- Air-Britain (historians) Ltd. 73
- Aircraft Technical Publications Limited 1
- Airfield Publications 1
- Airlife 56
- Airlife Publishing Ltd 4
- Airline Press Of California 1
- Airline Publication & Sales 1
- Airways International Inc, 1
- Alain De Gourcuff Editeur 1
- Alan Sutton 33
- Alaska Northwest Publishing Company 2
- Albany Books 1
- Albatros Productions Ltd. 3
- Albert E. Marriott 2
- Albert Whitman & Company 1
- Albertelli 1
- Albion House 2
- Albyn Press 1
- Alden & Company Limited 1
- Alden Press 2
- Aldine Publishing Company 1
- Aldus Books 1
- Alec Tiranti 1
- Alecto Historical Editions 1
- Alex Hogg 1
- Alexander Gardner 3
- Alexander Maclehose & Co. 1
- Alexander Moring Ltd. 1
- Alexander Strahan 1
- Alf Cooke Ltd. 6
- Alfred A. Knopf 10
- Alfred A. Knopf, Inc. 2
- Alfred Mame Et Fils 1
- Alison Green Books 2
- Alison Hodge 2
- Alister Taylor 1
- Allan North 1
- Allan T. Condie 1
- Allan W. Stobbs 1
- Allan Wingate 1
- Allan Wingate (publishers) Ltd 1
- Allen & Unwin 1
- Allen Figgis 1
- Allen Lane 4
- Allenson & Co. Ltd. 1
- Allied Newspapers Limited 2
- Allison & Busby 1
- Allyn & Bacon 2
- Allyn and Bacon Inc. 1
- Almark Publishing Co. Ltd. 3
- 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 3
- Amber Books 2
- Amberley 16
- Amberley Publishing 21
- 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
- Amulree Publications 2
- Ancient And Honorable Artillery Company Of The Masschusetts 1
- Ancient Order Of Foresters 1
- Andalus Press 1
- Andersen Press 47
- Andersen Press Ltd. 14
- Andersons-Edinburgh-Limited 2
- Andre Deutsch 39
- Andre Deutsch Children's Books 1
- Andre Deutsch Limited 2
- Andrea Press 2
- Andreas Papadakis Publisher 1
- Andred Publishing 1
- Andrew Dakers Limited 3
- Andrew Spottiswoode 1
- Andrews & Co. 1
- Angling Publications 5
- Angus 1
- Angus & Robertson 9
- Angus & Robertson Ltd. 2
- Angus & Robertson Publishers 4
- Annual Concepts Limited 7