I wasn't quite sure where to post this, but in the end, I figured this forum might work as well as any. Moderator, please move if you think appropriate...
We'll be going on vacation in Canada in July. So, I'll be physically in Canada and might want to buy some e-books that are not legally sold in the US due to this "sale-location-is-buyer's-location-rather-than-seller's-location" thing. Yeah, yeah, I know there are proxy servers and work-arounds, but it would be nice to just buy properly without (too much) hassle.
So, I am looking for info/recommendations, if anyone knows or has already thought about these things - I'm pretty sure someone on MobileRead will have!

I did do a bit of searching, and found some info on some books/authors and on a couple of e-bookstores, but some of it was pretty dated.
Are there any Canadian authors (esp. mystery/crime) that are available as e-books, or more available, in Canada, and not the US? Maybe someone like Alison Gordon? Or Gail Bowen, only some of whose books are available in the US? Or maybe some UK authors, especially historical mystery authors? I know most of what I see is the opposite - sighs of woe (or howls of fury) from Canadians about authors not available in Canada, but I'm wondering about the reverse
Which, if any, e-bookstores will recognize that I'm in Canada and not the US - presumably this means they would look at my laptop's IP address and not my billing address? And, if so, would a US billing address still screw things up - i.e. should I buy a gift card or ???
And, are some of the UK websites (Waterstones, WH Smith, etc.) more available in Canada than in the US?
Finally, I also do read some French, so wouldn't mind advice on French e-books as well.
I'm pretty format-insensitive, since I have multiple reading devices and apps available.
Thanks in advance for any advice - it will be much appreciated! And when I get back, I'll post if I learned anything new in the process.