There is a growing number of people who read the book first and then return it, while others make accidental purchases or notice glaring errors in the formatting. (goodereader.com)
You can avoid accidental purchases on Alexa by adding a passcode to the app on your iPhone or Android devices. (indabaa.com)
Apple has parental controls that can filter content and prevent purchases, and Android has restricted user profiles that can also prevent accidental purchases and filter Google Play apps. (pcmag.com)