Isla and the Happily Ever After is the third book in the Anna and the French Kiss series by Stephanie Perkins. It follows the story of Isla, a shy girl who has a crush on Josh, a charming artist. Set in Paris, the novel explores themes of love, friendship, and self-discovery as Isla navigates her feelings and relationships. The narrative captures Isla's journey through her senior year at School of America in Paris. As she faces challenges in her personal life and her relationship with Josh, she learns about the importance of communication and trust. The book combines romance with the struggles of growing up, making it relatable to young adult readers.