| Aleumar | France | 5 |
| Alexan | France | 35 |
| Alexandra de Saint Prix | France | 13 |
| Alexandre Moryason Editeur | France | 1 |
| Alexandre Stanké | Canada | 20 |
| Alexandrines | France | 5 |
| Alfa kitap | France | 5 |
| Alfaguara | Espagne | 132 |
| Alfil | France | 2 |
| Algaida | Espagne | 2 |
| Algonquin | France | 63 |
| Alianza | France | 34 |
| Alias | France | 11 |
| Alibi | France | 11 |
| Alice | Belgique | 327 |
| Alice James Books | Etats-Unis | 5 |
| Alice Lyner | France | 9 |
| Alice Tertio | France | 22 |
| Alidades | France | 18 |
| Alifbata | France | 11 |
| Alinea | France | 9 |
| Alire | Canada | 255 |
| Alire / Front Froid | Canada | 2 |
| Alisio | France | 169 |
| Alizés | France | 2 |
| Alkonost | France | 9 |
| Allary | France | 121 |
| Allegrio | | 2 |
| Allen & Unwin | France | 57 |
| Allen Lane | France | 18 |
| Allia | France | 318 |
| Alliage | Canada | 19 |
| Alliance biblique universelle | | 2 |
| Alliance française de Port-Vila | Vanuatu | 2 |
| Alliance Magique | France | 56 |
| Allison & Busby | Angleterre | 66 |
| Alloy Entertainment | Etats-Unis | 3 |
| Alma | France | 126 |
| Alma Books | Angleterre | 70 |
| Alma littera | Lituanie | 1 |
| Almasta | Suisse | 2 |
| Almora | France | 38 |
| Aloha Comics | Etats-Unis | 1 |
| Alors Hors du Temps | France | 1 |
| Alpen | France | 26 |
| Alpha | | 25 |
| Alpha Book | France | 18 |
| Alphée | France | 94 |
| Alphil | Suisse | 11 |
| Alphonse Leduc | | 8 |
| Alphonse Lemerre | France | 16 |
| Alsatia | France | 30 |
| Alta | France | 8 |
| Altal | | 5 |
| Altalena | Espagne | 1 |
| Altamira | | 2 |
| Altaya | | 40 |
| Alter Real | France | 1030 |
| Altercomics | France | 6 |
| AlterEdit | France | 18 |
| Alternatives | France | 91 |
| AlterPublishing | | 1 |
| Alterre | France | 1 |
| Althea Press | | 2 |
| Altipresse | France | 14 |
| Alto | Canada | 194 |
| altraverse | Allemagne | 1 |
| AltWit Press | | 4 |
| Alvik | France | 9 |
| Alysse | France | 2 |
| Alzabane | France | 19 |
| AMACOM | Etats-Unis | 2 |
| Amalthée | France | 198 |
| Amanite | France | 8 |
| Amarante | France | 4 |
| Amaterra | France | 114 |
| Amazon | | 94 |
| Amazon Crossing | | 195 |
| Amber Books | Angleterre | 6 |
| Amber Quill Press | Etats-Unis | 3 |
| Amberjack Publishing | Etats-Unis | 3 |
| Amberley | | 5 |
| Ambre | France | 16 |
| Ameet | Allemagne | 1 |
| Amereon | France | 1 |
| American gothic press | Etats-Unis | 9 |
| Amérik Média | France | 1 |
| Amethyste | | 40 |
| Amicale Jean Ray | | 10 |
| Amilova | | 2 |
| Amiot Dumont | France | 8 |
| Amistades Particulares | Espagne | 22 |
| Ammann | France | 1 |
| Ammonite Press | France | 3 |
| Amok | France | 6 |
| Amorosa | France | 9 |
| Ampelos | | 6 |
| Amphora | France | 80 |
| Amrûn | Allemagne | 1 |
| Amsterdam | France | 105 |
