I'm going to give you some context so you can understand the situation fully : 1) The professor gave the pdf of the book to the student association so that they could easily distribute it to all students, as they were supposed to do. They made a margin of 2-3 euros per print, which is fucking crazy for a student association which is not supposed to make money from students. That's how it works in France, as I'm part of a student association, I know they are not supposed to make money out of students. It's not a company. And it wasn't to finance other projects of the association. 2) The book wasn't really a book, it was 150 pages linked like that : 3) There was no ownership of the book, as the professor wanted us to have the book for free, or at production cost.