Write to us
An address given before you know whether it is the right door produces misdirected mail. Here are the doors, and what goes through each.
The routes that are open
Report a mistake in a book or on the site
- Who reads it
- The publishing team
- What goes this way
- A content mistake, a worked answer that does not come out right, a dead link, a page unreadable on a device, a wording that misleads.
- What you can expect
- A written reply. If it is a mistake, it is corrected, the book is redated, and the change is written on the What is new page. If it is not, the reply explains why.
Write to the publishing house
- Who reads it
- The publishing team
- What goes this way
- A request for a textbook on a subject, an offer to translate, a plan to use a book in a school, a licensing question that this site does not answer.
- What you can expect
- A reply, and no promise of a schedule: the association opens one title at a time, and a request weighs on the decision without making it.
Reach the association itself
- Who reads it
- ODERSA
- What goes this way
- A partnership, funding, an agreement, an invoice, a question that concerns the association rather than its publishing house alone.
- What you can expect
- A reply from the association. Outgoing mail leaves from this address; the publishing address receives and never solicits.
Disclose a security issue
- Who reads it
- The technical contact of the association
- What goes this way
- Responsible disclosure: a leak, a dangerous configuration, unexpected behaviour of the site. The address is also declared in the security file of the site, at the address the standard reserves for it.
- What you can expect
- An acknowledgement, then a fix or an explanation. Nothing will be published on your behalf, and nothing will be hidden.

What makes a report useful
An email that gives the page, the passage and what should be there instead is handled in one reading. An email saying there is a mistake somewhere needs a full rereading, and it will wait longer, without that being a matter of goodwill.
If the problem is visual, the width of your screen and the name of your browser are enough: the association reproduces the issue from those two facts. No screenshot is needed, and no personal information is asked for.
There is no form on this site, and that is deliberate: a form implies a server that receives, therefore data in transit and data stored. An email leaves your own software, arrives in a mailbox, and the association collects nothing along the way.
The addresses on this page are the ones the site publishes everywhere else: at the foot of every page, in the settings panel, and in the security file. They are written in one single place in the repository, and every page reads from it.