By educational standards, .edu is the most reliable source, followed by .org, and a close third of .com. However, this is not always the case, for organizations (.org) such as Wikipedia is not mainly trusted. Also, you must note that just because it has .edu does not mean it should be trusted either, for it may be biased to a certain thought.
Answer: Kiana should keep the book with her until she can return the book. Kiana should set a reminder on her phone to go off just before she normally goes to the library, as a reminder.