How can I tell if a book on Amazon etc is in the library
Titles held at the library can be identified with the 'Library Extension' for the Chrome browser.
It creates a panel in the page showing you where is is available. You can find out more at : https://www.libraryextension.com
Answer
You can use the Chome, Firefox and Edge browser extension : Library Extension to do this. This will show book and ebook availability.
The video attached to this answer shows the extension in Chrome, which is supported by the library.