Have you checked the online stores of the regular book stores in your country? In Sweden I think both (yes, all two! Adlibris and Bokus) of the major book stores sell ebooks. For some titles they're actually better than the Kobo store (especially for classic books and nordic publishers I think).

Personally I'm happy with the Kobo store and Libby/Overdrive though. Anything that's not Amazon is fine in my book, and I really like that progress is synced between phone and e-reader for the few times that I don't have my reader with me.