Hi there! I see you're having trouble opening books in the Libby app on your WebKit Android device with version 10. Let's work through this together to get you back to reading.

First, could you tell me if you are seeing any error messages when trying to open a book? Also, are the books downloaded to your device, or are you trying to stream them? Knowing this will help me guide you better.

Meanwhile, here are some initial steps you can try:

1. Close the Libby app completely—make sure it's not running in the background—and then reopen it.

2. If you have downloaded the book, try deleting the downloaded file for that loan and then download it again. Sometimes files get corrupted during download.

3. If the book is set to "streaming," try switching it to "downloaded," or if it's downloaded, try streaming it instead.

4. Double-check that your library card associated with Libby is still valid and re-verify it inside the app.

If you've already tried any of these, please let me know which ones so I can suggest other options.

Does that sound good so far?