Play Books is not available in my country but books are showing up in the store?

[Evoken]

Play Books isn't available yet for my country but when I go to the play store homepage, I see some books listed:



When I click on any of them I get a "An unexpected error has occurred. Please try again later" message and it doesn't takes me to the detail page for the book.

Any idea why this may be happening? Does it means that Play Books will be available soon? It's been like this for several days.