I'm sorry about the issue. Please try the following:
- Press and hold the Power on / off button on your Kindle for about 30 seconds, then turn it back on and check.
- If that does not work, tap and hold on a problematic book, then tap on the option to delete / remove it for now.
, then sign in your Amazon account at the website below:
, then click on the Action icon of that book, then select the Deliver option, then select your kindle device, then select Deliver, and check.
Please type at the box below, then click on the Send button below to communicate with me, so I can help further. Thank you,