I don't know the ins and outs of geogaphic restriction for ebooks.
What I do know, is there are long-dead authors who have ebooks for sale in the UK that I cannot buy in the US. Not sure why.
To top it off, one of the authors I have been seeking out, Gordon Dickson, is an American author and has plenty of pbooks available. His ebooks are primarily in the UK, which I am prevented from purchasing due to these stupid geographic restrictions. Something doesn't make sense in this.
Its supposed to be a global market. I've ordered physical goods from Europe a few times in the past, and twice from China. But an electronic ebook that can be downloaded? PROHIBITED.
Vic