A
- Ablex Publishing - an imprint of Elsevier
- Ace Books - an imprint of Penguin Group
- Academic Press - UK publisher - now an imprint of Elsevier
- Addison–Wesley - an imprint of Pearson Education
- Adis International - an imprint of Wolters Kluwer
- Adler Publishing
- Akashic Books - independent small press, known for their noir series
- Aladdin Paperbacks - a children's fiction imprint of Simon & Schuster
- Allen & Unwin
- André Deutsch - an imprint of Carlton
- Andrews McMeel Publishing
- Anova Books
- Anvil Press Poetry
- Applewood Books
- Apress - technology book publisher
- Arbor House
- Arcade Publishing
- Arcadia Publishing - local U.S. history
- Airiti Press - an imprint of Airiti Inc
- Arkham House
- Armida Publications
- ArtScroll - a major imprint of Mesorah Publications
- A. S. Barnes (founded by Alfred Smith Barnes)
- Athabasca University Press
- Atheneum Books- a children's fiction imprint of Simon & Schuster
- Atheneum Publishers - publisher of political books including the Pulitzer Prize Winner The Making of the President, 1960
- Atlas Press
- ATOM Books a UK based imprint of Little, Brown
- Augsburg Fortress - official publishing house of the Evangelical Lutheran Church in America
- Aunt Lute Books - feminist publisher (US)
- Avon Publications - an imprint of HarperCollins (as of 2010).
Read more about this topic: List Of English-language Book Publishing Companies