| Atrium | Suisse | 4 |
| Attelage | | 2 |
| Attila | France | 39 |
| Attinger | Suisse | 6 |
| Au bord des continents | France | 98 |
| Au bord du Lot | France | 2 |
| au Carré | Canada | 14 |
| Au Coeur Du Monde | France | 1 |
| Au diable Vauvert | France | 575 |
| Au fil du temps | France | 6 |
| Au Loup | | 48 |
| Au Merle Moqueur | France | 1 |
| Au pays rêvé | France | 18 |
| au Pluriel | France | 10 |
| Au sans pareil | France | 21 |
| Au vent des îles | France | 88 |
| Au-delà du raisonnable | France | 8 |
| Aubanel | France | 15 |
| Aubéron | France | 20 |
| Aubier Archimbaud | France | 9 |
| Aubier Flammarion | France | 48 |
| Aubier Montaigne | France | 30 |
| Auda Isarn | | 2 |
| Audacce | France | 2 |
| Audace | Belgique | 2 |
| Aude et ses livres/ Librairie du Conquérant | France | 2 |
| Audelo | | 10 |
| Audible studios | France | 2371 |
| Audie | France | 42 |
| Audience | | 13 |
| Audimat | France | 5 |
| Audiocite | | 8 |
| AudioGO | France | 33 |
| Audiolib | France | 1466 |
| Audiolude | | 6 |
| Aufbau | Allemagne | 51 |
| Augenscheinverlag | Allemagne | 4 |
| Auguste Zurfluh | France | 1 |
| Augustine Éditions | France | 1 |
| Aunt Lute | | 2 |
| Aurinko Kustannus | Finlande | 2 |
| Aurora | | 5 |
| Aurore Demilly | France | 1 |
| Aurum Press | | 11 |
| Ausonius | | 2 |
| Austin Macauley Publishers | Angleterre | 2 |
| Austral | France | 37 |
| Auteurs d'Aujourd'hui | France | 11 |
| Autisme France Diffusion | France | 4 |
| Autoédité | | 46501 |
| Autonomous Press | Etats-Unis | 2 |
| Autour Du Livre | France | 10 |
| Autrement | France | 588 |
| Autrement Dit | France | 2 |
| Autres Temps | France | 15 |
| Autumn Publishing | Angleterre | 11 |
| Aux 3D | France | 4 |
| Aux Feuillantines | France | 1 |
| Aux Forges de Vulcain | France | 162 |
| Aux portes du large | France | 2 |
| Aux Sources du Maica | France | 1 |
| Auxilivre | France | 1 |
| Auzou | | 880 |
| Avalon Travel Publishing | France | 14 |
| Avant | Allemagne | 3 |
| Avant-Propos | France | 7 |
| Avatar Press | Etats-Unis | 19 |
| Ave Maria Press | Etats-Unis | 1 |
| Avenir Proche | France | 2 |
| Aventuriers d'ailleurs | France | 13 |
| Averbode | France | 56 |
| Avery | Angleterre | 20 |
| Avid press | | 4 |
| Avid Reader Press | Etats-Unis | 4 |
| Avis de Tempête | France | 4 |
| Avon Books | Etats-Unis | 341 |
| AVP | France | 2 |
| AWA | Etats-Unis | 30 |
| Award Publications | Angleterre | 1 |
| Awoudy | Togo | 1 |
| Axoloti | | 4 |
| Az'art Atelier | | 1 |
| Azalées | France | 6 |
| Azbooka-Atticus | Russie | 1 |
| Azimuts | France | 5 |
| B & Z (BZ Books) | | 1 |
| B (CHL) | Chili | 2 |
| B (ES) | Espagne | 1 |
| B and D | France | 1 |
| B Wahlströms | | 6 |
| B&O (BO) | France | 5 |
| B's-LOG | Japon | 1 |
| B. | France | 4 |
| B. Arthaud | France | 8 |
| B. H. Blackwell | Angleterre | 9 |
| B.E.S. Publishing | Etats-Unis | 2 |
| B.T. Batsford | Angleterre | 7 |
| B2 | | 3 |
| B42 | France | 26 |
| Baam! | France | 65 |
