Hello, I’m Nathan, and I’ll be assisting you today.
Sorry to hear that you’re having trouble with this but I’ll do my best to help you out, Sally.
Are the books you are referring to all items that you purchased directly from amazon?
Thank you for confirming.
If they are purchased from amazon, and your oasis is registered to the same amazon account, then all your prior purchases will automatically "sync" to the new kindle, once it is connected to your home wifi network.
If you don't see them right away, don't worry, they can take awhile to all download.
You can also go to the home screen, then at the top choose the tab for the CLOUD library (rather than device library) and you'll see the items there as well. Tapping on any one of them will prompt it to download directly to the kindle.
If you get stuck, let me know.
Do you need more help with this, Sally?