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- 1st Book Library
- 8th Circle Press
- A-Girl Studio
- A. D. Wrae
- A. I. Rivers
- A.V Thorn
- Aaman Lamba
- Aarat
- Abbey North Jaff Books
- Abraham R. Nox
- Acerbi & Villani Ltd
- Acorn
- Across the Veil Books
- Addison Cain
- Adelphi Press
- Advantage Media Group
- Aegypan
- Aesthete Press
- Aethon Books, LLC
- Aiden Pierce
- Ainsley James Books, LLC
- Ajeeb Prince
- Akash Gondor
- Alchemy Books
- Alcove Press
- Alec Joen
- Alex Alicea
- Alexandria Foss
- Ali Shah Publisher
- Alice R. Deutsch
- Alice R. Francais
- Alice Rooster
- Alice Sharp
- Alma Books
- Aloejimmy Publishing
- Alstroemeria Publishing
- Alta Hensley
- Alydia Rackham
- Alyssa Bailey Romance
- Amazon Digital Services LLC - KDP Print US
- Amber Joi Scott
- Amber Palmer
- Amber Thoma
- Amber Vant
- American Literatures Initiative
- American Mystery Classics
- Amethyst Corvid Press
- Amistad Press
- Amore Publishing
- Amorist Press
- Amy J. Heart
- Amy Renfroe
- Anchor Books
- Ancient Wisdom Publications
- And You Press
- Andrews McMeel Publishing
- Angela Aaron
- Angela J. Ford
- Angelina Conti Dark Romance
- Angry Robot
- Anissa Cosby
- Ann Marie Ruby
- Ann Ric
- Anna Augustine
- Anna Campbell
- Anna Katmore
- Anna Rose
- Annabeth Smith
- Anne Renwick
- Ansley Johnson
- Anson Street Press
- Anthem Press
- Antonio Carlos Pinto
- Anya J Cosgrove
- AP Miller Productions
- Apokrupha
- Apophis Enterprises LLC
- Arcade Publishing
- Arcturus Publishing Ltd
- Aria
- Aria Gomez
- Arianna Fraser
- Arka Publishing
- Art by Easton
- Arya Sloane
- As Holdings and Assets Publishing
- Ascent Agencyhing Plc
- Ashley Bresee
- Ashley Elizabeth
- Ashwood Press
- Atheneum Books for Young Readers
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- Atlas Vista Publisher
- Atmosphere Press
- Atria Books
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- (margaret) Oliphant
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- Rosemary Sansum
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- T. W. (Thomas Wilkinson) Speight
- Walter Scott
- William Harrison Ainsworth
- William Hughes
