E-book sources . . .
SORA - Sora is an online library that contains ebooks and audiobooks.
Ector County Online Library -- The app you use is Libby, and it can be downloaded from your app store. You will also need an account with the Ector County Library so sign up for one if your family doesn't already have an account.
Destiny -- This app is an online card catalog that can assist you to look up books and areas of interest so you can submit a book order to your librarian.
Here is a video explaining using Destiny and the Library Book Request form.