Thank you all for your advices, it seems like a nice community
I bought the book at numilog, and didn't notice the "what are your PID" field on the form.
But I am pretty sure the book is DRMed, otherwise I could open it and convert to another format easily, right?
I am the worst case possible as I don't even have an intel mac ahah…
I'll try to ask a friend to install Mobipocket Reader on a PC and give me the PID, then redownload the book, and retry…
What a @ª†º¬å∑∂ just to read a 10€ book , that I legally bought, on my own device. What are they thinking…? They treat their customer as thieves anyway, I would better just get an illegal pirate version
Thanks again, I'll let you know how it went…