In the US, Amazon sells Kindles, including the popular Kindle Paperwhite, at a $20 discount off its retail price of $189.99 if you buy an "ad-supported" edition.

The ad-supported version typically sells for $20 cheaper than the ad-free one. According to those with lock-screen ads, many Kindles are displaying ads for AI-generated books.

Last month, we reported that the lock screens of Amazon Kindles were displaying ads for what were obviously AI-generated books, leading to an outcry from readers on social media. At the time, our ...