I'm running into this more and more often: a book is available on Amazon in the UK but Kobo tells me that book is not available in the UK (although available elsewhere). Latest is The Darwin Elevator by Jason M Hough.
Very annoying. I'd rather buy from Kobo than Amazon.
Actually, I'd rather buy from anywhere that would sell me a DRM-free version... but that's another story.
Rant over. Back to your regular programming.
Actually: ignore all of the above. The Kobo store website gives different results depending on how you get to it. If I start from scratch, the book is available after all. Sigh.