/jp/ - Otaku Culture

I need some advice regarding purchasing and reading digital LNs. I'd like to read LNs on my android phone or a windows tablet during commutes. Right now I'm using OCR Manga Reader for Android with scanned LNs and it's pretty decent but dictionary lookup would be easier and more accurate if I purchased a digital copy right?

So I created an Amazon.co.jp account, set the country to japan, entered a Japanese address (taken from OPAS), downloaded the android Kindle app and logged on. I "purchased" some free ebooks from the Japanese store to test things out and this is what I see when I try to open them. I also installed Tunnelbear and set the VPN to Japan but I still see this error.

Okay, this makes me want to stick to piracy but before that, does anyone know where I went wrong? Should I try another ebook store - preferably one that uses a format that can be cracked so I can read it in whatever reader I want.