| Onapratut |
France |
3 |
| Once Upon a Time |
Etats-Unis |
2 |
| One more chapter |
Angleterre |
38 |
| One Planet |
Kenya |
1 |
| One Sharp Marriage Publications |
Etats-Unis |
1 |
| One World |
Etats-Unis |
53 |
| Oneiroi |
|
11 |
| Oneworld Publications |
|
48 |
| Oni Press |
Etats-Unis |
72 |
| Online |
France |
1 |
| Onlit |
France |
54 |
| Onwe Press |
|
2 |
| Onyx |
France |
22 |
| Ookilus |
France |
8 |
| Ookura shuppan |
|
5 |
| Opeasi |
|
1 |
| Open Court Publishing |
Etats-Unis |
1 |
| Open Letter |
Etats-Unis |
4 |
| Open Road |
France |
78 |
| Open Strange Doors |
France |
2 |
| Opéra |
|
9 |
| Ophiledespages |
|
6 |
| Ophrys |
France |
41 |
| Opta |
France |
189 |
| Optic |
France |
1 |
| OQO |
Espagne |
17 |
| Or Books |
Angleterre |
1 |
| Orange Verte |
France |
1 |
| Orb Books |
Etats-Unis |
15 |
| Orban |
France |
2 |
| Orbit |
Angleterre |
858 |
| Orca Book Publishers |
France |
9 |
| Orchard Books |
Angleterre |
51 |
| Ordalaget Bokförlag |
Suède |
13 |
| Orenda books |
Angleterre |
19 |
| Orep |
France |
44 |
| Organic |
|
4 |
| Organisation des Nations Unies (ONU) |
|
3 |
| Orients |
|
4 |
| Original Books |
France |
23 |
| Original Watts |
France |
5 |
| Originale |
|
1 |
| Orion Books |
Angleterre |
642 |
| Oris |
France |
2 |
| Orizons |
France |
9 |
| Orphée |
France |
6 |
| Orphée / La Différence |
|
9 |
| Orphie |
France |
45 |
| Orso |
France |
10 |
| Ortho |
France |
2 |
| Osaka |
|
2 |
| Oscar Mondadori |
Italie |
166 |
| Osismes Productions |
|
1 |
| Oskar |
France |
522 |
| Oskarson |
France |
5 |
| Oskedith |
France |
1 |
| Oslo |
France |
16 |
| Osméosis |
|
8 |
| Osmora |
|
6 |
| Osolasba |
|
1 |
| Ostraca |
|
1 |
| Otava |
France |
6 |
| Otema Autisme |
France |
3 |
| Other Press |
France |
12 |
| Otherlands |
France |
36 |
| Ototo |
France |
477 |
| Otrante |
|
3 |
| Oû Pyid des Phares |
France |
1 |
| Où sont les enfants ? |
France |
2 |
| Ouest & Cie |
France |
13 |
| Ouest-France |
France |
530 |
| Ourania |
France |
22 |
| Ouroboros |
France |
2 |
| Ours et Loup |
France |
1 |
| Ousia |
Belgique |
1 |
| Outside |
France |
2 |
| Outskirts Press |
Etats-Unis |
3 |
| Outthink editing |
Etats-Unis |
1 |
| Outworld |
France |
4 |
| Ouverture |
Suisse |
6 |
| Ouvrières |
France |
11 |
| Ouvrir un Monde |
France |
4 |
| Ovadia |
France |
16 |
| Ovation Médias |
France |
1 |
| Overfall Press |
Etats-Unis |
1 |
| Overjoy |
France |
3 |
| Overlap |
Japon |
3 |
| Overlook |
France |
5 |
| Overlook Press |
France |
2 |
| Ovilorôi |
|
2 |
| OVNI |
|
3 |
| Oxbow |
|
1 |
| Oxford University Press |
Angleterre |
511 |
| Oxus |
France |
8 |
| Oxygen Books |
Angleterre |
1 |
| Oxymore |
France |
35 |
| OXYMORON |
France |
27 |
| Oz books |
Etats-Unis |
1 |
| Ozark Mountain Publishing |
Etats-Unis |
1 |
| Ozril |
France |
3 |
