Title says it all.
@shotgunfingers just got typed by Gulenko, which is quite cool, but also too expensive for my standards. I'm willing to spend at max 60 euros.

It has to be a person which has published stuff and/or written books and proven to be a knowledgeable socionist.

(Yes, I already know that with my budget I should sacrifice some of these standards, but I'm stretching it just to give an idea)