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- 13 Elements
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- 3rd Coast Books L.L.C.
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- ABC-CLIO
- ABDO & Daughters
- Abdul Ahad Ansari
- Absolute Author Publishing House
- Academic Press
- Academic Studies Press
- Academica Press
- Acme Digital
- Adam Podkowa
- Adelphil Consultancy
- Admiral House Publishing
- Adventures Unlimited Press
- Aegypan
- Aeressa
- Afnil
- African Perspectives Publishing
- Agency Books
- Agio Publishing House
- Ags Wordsmiths
- Aha! Press a Howard Activity, LLC
- Air World
- Airship 27
- Airship 27 Productions
- AK Press
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- Aladdin Paperbacks
- Alanthereaultauthor
- Alastair Davie
- Aleph Book Company
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- Alexander Tetelbaum
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- Algonquin Books
- Alistern Press
- Allen & Unwin
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- Alpha Edition
- Alpha Group 3 LLC
- Alton Ioerger
- Amazing Stories, LLC.
- Amazon Crossing
- Amazon Digital Services LLC - Kdp
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- Amber Publishers Company
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- Anam Rasheed
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