Yes, they sell internationally, but some books are geo-restricted.
For your Kobo, buy MultiFormat books (DRM-free) and sideload the ePubs in the regular manner. "Secure eReader" will need to be stripped and converted.
They've a pretty good selection of quality older backlist science fiction/fantasy if you like midlist authors who've generally fallen out of favour with the regular publishers/reading audience. Here's a set of
publisher imprint recs/links I once did for FW-available sf stuff, and here's a more recent post with
some more catalogue links included, which you may or may not find useful.
Hope this helps.