Borderlines

Only must read from the NYTimes:

Opinionator - BORDERLINES

"Countries are defined by the lines that divide them. But how are these lines decided - and why are some of them so strange? Borderlines explaores the stories behind the global map, one line at a time."
- Written by Frank Jacobs, "a London-based author and blogger. He writes about cartography, but only the interesting bits."

Great articles about maps, countries and boarders. And he uses references.