Publishers
- Aerofax 6
- Aerospace 7
- Agre Books 1
- Ahmadu Bello University Press 3
- Aidan Ellis Publishing Limited 1
- Air Age 1
- Air Britain 1
- Air Combat Classics 1
- Air Crew Association 1
- Air Force History & Museums Program 1
- Air Museum Publications (york) Ltd 1
- Air Research Publications 1
- Air Review Ltd. 4
- Air University Press 1
- Air-Britain 2
- Air-Britain (historians) Ltd. 12
- Airlife 73
- Aktiebolaget Hasse W. Tullbergs Forlag 1
- Aladdin Books 1
- Alain De Gourcuff Editeur 1
- Alan Leech 1
- Alan R. Liss Inc 1
- Alan Robertson 1
- Alan Sutton 57
- Alaska Northwest Publishing Company 1
- Albatros 1
- Albatros Productions Ltd. 4
- Albert E. Marriott 2
- Albert Whitman & Company 1
- Albion House 5
- Alden & Company Limited 1
- Alden Press 3
- Aldine 1
- Aldine Books 1
- Aldine Publishing Company 2
- Alec Tiranti 1
- Alecto Historical Editions 3
- Alexander Gardner 2
- Alexander Maclehose & Co. 2
- Alexander Moring Ltd. 6
- Alexander Strahan 1
- Alf Cooke Ltd. 11
- Alfred A. Knopf 14
- Alfred A. Knopf, Inc. 5
- Alfred Hahns 2
- Alfred Mame Et Fils 1
- Algonquin Publishing Company 1
- Alif 1
- Alison Green Books 1
- Alison Hodge 1
- All-Pets Books, Inc. 1
- Allan & Unwin 1
- Allan North 1
- Allan T. Condie 1
- Allan Wingate 4
- Allen & Unwin 5
- Allen Figgis 1
- Allen Lane 12
- Allenson & Co. Ltd. 2
- Allison & Busby 1
- Allman & Son Limited 1
- Allyn & Bacon 2
- Allyn and Bacon Inc. 2
- Almark Publishing Co. Ltd. 3
- Alpha Science International Limited 1
- Alphabooks 1
- Alpine 2
- Alpine Fine Arts Collection 2
- Alpine Publications, Inc. 1
- Alston Rivers Ltd. 2
- Altitude Publishing 1
- Alvin Redman Limited 1
- Amadeus Press 1
- Amazon Publications 4
- Amber Graphics 1
- Amberley 16
- Amberley Publishing 10
- American Asssociation For The Advancement Of Science 1
- American Bee Journal 1
- American Heritage Publishing Co. Inc. 1
- American Institute Of Architects 1
- American Institute Of Chemical Engineers 1
- American Iron And Steel Institute 1
- American Mathematical Society 12
- American Society Of Agricultural Engineers 1
- Amex Company Limited 1
- Amex Company Ltd. 2
- Amiot Dumont 1
- Anaconda Editions 1
- Ancient And Honorable Artillery Company Of The Masschusetts 1
- Ancient Order Of Foresters 1
- Andersen Press 65
- Andersen Press Ltd. 18
- Anderson Press 2
- Andersons-Edinburgh-Limited 2
- Andre Deutsch 62
- Andre Deutsch Children's Books 1
- Andred Publishing 1
- Andrew Cole 1
- Andrew Dakers Limited 2