Yes, you can. When they first released in e book, I went through a few hoops and was able to buy the uk version.
There was a link on an old thread here about the way to go about it.
As I remember, you get an account on Amazon uk using a free email. You tell the free email site you are in the uk. Then you buy the books as a pressie (use uk idioms and spellings), for the non uk human. The books are charged to your card and bob’s your uncle!
Good luck.