@ Rose Marie, I went to Amazon and found some info that might help you. When you turn your Kindle on and are at the "page" where your books are listed, at the top of the page , there are several buttons.
Books Cloud Device Store >
By Arthur By Recent By Title
If the "Cloud" button is pressed, all your books will show. If the "Device" button is pushed, only the ones in your device will show. IE those with the arrow will disappear. Does that help??