Instruct: Classify Amazon reviews into positive or negative sentiment
Query: not enough specialty books available

There are not enough books available for this device (at least for me). I don't really mind reading occasional fiction on kindle, but there's little to none specialty books such as theology, history of religion kind of book. And this is frustrating. I don't even mind paying full amount price of a hard copy for a kindle version of a book, but it isn't available. Mostly, popular stuff. And one more thing-formatting sometimes is very unfriendly. In general, I somewhat disappointed in Kindle, I still have to buy plenty of paper books because those aren't available for Kindle