The Amazon app will only let me download a sample for Kindle. There’s no longer a button to purchase a book. I’ve bought many books for Kindle before. What’s up?
Are you using an iDevice? If yes, you can't buy from within the app. Use a browser to make the purchase and have it delivered to the app.
Apple wanted 30% of the sale, so the ability to buy from within the app was removed by Amazon.
...bicycle, unicycle, unitard, hockey puck, rattle snake, monkey, monkey, underpants.