Trying to manage pending deliveries as per:
Amazon Device Support › Managing Your Amazon Devices, Content, and Account›
Deliver Items to Your Fire or Kindle
You can deliver content from Manage Your Content and Devices to your device or Kindle reading app.
You can deliver content to compatible devices from Manage Your Content and Devices.
Manage Your Content and Devices
From your computer:
- Go to Manage Your Content and Devices.
- Select the title, click the Actions [...] button, and then select the option to deliver the content to your Default Device or Others.
- If you selected Others, select the device(s) or Kindle reading app(s) from the drop-down menu and then select Deliver.
Note: If the title you've selected isn't compatible with a device, the name of the device will be greyed out in the drop-down menu.
- Select Deliver. Your content will automatically be delivered to your device or reading app once it's connected to a wireless network.
Note: You can select Pending Deliveries from the Show drop-down menu to view titles that haven't been sent to your device or Kindle reading app.
However, I have three pending deliveries which I cannot delete. How do I delete pending deliveries?
In the actions column there's a button with a three dot elipses,
..., clicking gives the title of the book, device it's to be delivered to, and the date it was sent. These three items are from November 16, last week.