I download books from my library with Libby and they don’t expire while airplane mode is on.
Since a lot of books have a wait and Libby lets you delay delivery, I queue up a bunch of books while I’m reading. When I’m done with my current batch, I turn off airplane mode, check out a bunch of books, and then turn on airplane mode just before it’s time to return the first one.
I download books from my library with Libby and they don’t expire while airplane mode is on.
Since a lot of books have a wait and Libby lets you delay delivery, I queue up a bunch of books while I’m reading. When I’m done with my current batch, I turn off airplane mode, check out a bunch of books, and then turn on airplane mode just before it’s time to return the first one.
I do this like every 6 months.