My friend's birthday is coming up next month and I have absolutely no idea of what to send him (he lives in Argentina). I've thought really hard about it and still.. nothing!.

He's a good friend but we almost have zero tastes in common.
I've thought of sending him a book in English (since they're hard to come by where he lives and I think he'd enjoy it) but again, I'm not sure which one.. he's studying law, and he's a bit radical in his political views, we never agreed on anything and every time I went through his books selection I'd lose interest so that could be reciprocal, he's also very into traveling, often the wild kind (say, 3 months wandering around the jungle

)..
Gadgets are out of the question as I'm afraid they'll get lost when they reach the customs.
Clothing is also a no-no because he's not interested
and he has a very jealous girlfriend, it took her a while to warm up to me so I wouldn't want her to take things the wrong way now that we've come this far.
I keep thinking of books but he's on his final year of Uni so I don't think he'll have that much time for it. I also thought of some nice book of photographs.. but photographs of what?!.. I've thought of regional stuff but truth is, I'm not patriotic and I find these souvenir type of gifts to be very corny.
*eta: he likes games. and I know nothing about games. maybe someone could help me there.
Any help?!