Indeed, it is based on a true story. This aspect of the book can give readers a different perspective on the events and characters. It might make them more empathetic towards the situations described, as they know these could have actually occurred in someone's life. It also shows how real - life drama can be transformed into a captivating literary piece.
We can learn about human relationships. Since it's based on a true story, it might show real - life relationship dynamics, like how neighbors interact, the importance of communication, and how secrets can affect relationships.