How to deal with a nosy fellow graduate student? There is another graduate student at my school working in the same area as me that is extremely nosy about my work. His curiosity definitely goes beyond the normal amount of "What are you working on?" chit-chat that I have with other graduate students. He frequently asks me to list exactly (his words) which papers I'm reading. If I walk past him in the hallway holding a book or a paper under my arm, he'll (very obviously) contort his neck to see what it is. If I'm working somewhere public, he'll walk up to the table and start reading what I'm working on.

This may sound silly, but I really feel like my privacy is being violated. I think this guy's behavior is creepy and rude. I could never imagine doing any of the things I listed above. What I do with my time is my business and no one else’s, and what other people do with their time is not my business. How can I deal with this guy without appearing unfriendly?

I don't want to appear unfriendly because this other graduate student works in the same area as me and I don't want to burn any bridges. In my very short time in academia, I have also never witnessed anyone acting unfriendly. I have no idea what is appropriate or how to calibrate my response. It is also difficult because the other student is not the same nationality as me, so maybe there are cultural things that I don't understand.

I can't merge my accounts to comment. I am indeed a woman.
In my experience, when it comes to dealing with people with boundary problems, you have to talk to them (in private).

This isn't nice (it might come off as unfriendly), this isn't fair (you just want to do your work, not deal with this issue), but it's the best course of action -- both for your job satisfaction and (in the long run) for the other person (if he can learn from feedback).

Framing the conversation is going to be difficult -- I'd suggest "I" statements ("I notice that you look at my material ...") and framing the issue as your perception ("I perceive this as nosy. I'd like to talk about my work, but I see this behavior as an intrusion of my privacy."). Given that probably most people would consider his behavior as "nosy", you might even point out that other people might regard this kind of behavior badly too. Hmm, just stick to describing the behavior and avoid making judgments about the person. You can change behavior, you can't (easily) change the person.

(Note: I might be biased here. I recently tried to solve a boundary problem via non-verbal communication, only to notice -- again -- that people with boundary problems don't notice non-verbal cues (correctly or at all). If they did, they would not have crossed boundaries in the first place. So non-verbal "cues" are either overlooked, ignored, or they react in the opposite direction of the desired effect. For example, they notice that a person is distancing himself from them, so they move in even closer. Addressing the issue verbally is anything but easy but I think it's the way to go.)