Your Amazon.com Kindle is out of memory space
Dear Moira
We are writing about your Kindle (Moira's Paperwhite). Content is waiting to be downloaded to your device but your Kindle does not have enough memory space left to receive this content. To free up memory, go to the Home screen on your Kindle to remove items you no longer need on your device. Note that a copy of Kindle content you purchase from Amazon is kept at the Manage Your Content and Devices page on Amazon.com. This Amazon service securely stores all of your Kindle books and recent issues of newspapers and magazines and allows you to retrieve them if you have previously deleted them from your Kindle. You can also retrieve this deleted content from "Archived Items", found on your Kindle's Home screen.
AUGH
WHAT THE ACTUAL HELL
I THOUGHT THIS WAS SUPPOSED TO HOLD MULTITUDES OF LIBRARIES