cjareck wrote:I am not a freelancer since I have got a job at the university. But this was something extraordinary. An association wants to have a book about a small town called Działdowo. They choose a group of historians, who research different periods and offered them money from writing texts about this settlement. We signed an agreement which contained things like what we should write, how much we should write when we should finish and how much the other side is ready to pay for it.
Ok, this is a tricky one. Technically, you are employed by the university, which means you are not a freelancer. However, in the case of this specific project you are freelancing (or doing some freelance work). So, to describe this situation in English, I think there isn't one word that explains the entire situation, so you'd have to specify, "I'm a university employee who is freelancing on a project." or "I'm employed by the university but I'm doing freelance work on a book that was commissioned by an association."