One of the characteristics of Modernist writing is that it attempted to be more realistic. Moreover, it wanted to emphasize the psychological processes of its characters. In the case of internal monologue, modernist writers often portrayed this in a way that jumped from topic to topic. This is because this strategy mimics the way in which the human mind works.
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.