“Foolish Hearts” by Emma Mills is a captivating young adult novel that captures the nuances of high school relationships. The story follows Claudia Wallace, a relatable protagonist who stumbles into an unlikely friendship with the aloof Iris Huang. The narrative beautifully explores themes of acceptance, love, and understanding. Mills excels in crafting sharp dialogue and endearing characters. Readers will appreciate the authentic depiction of teenage angst, contrasted with moments of warmth and humor. The intertwining of friendship and budding romance adds depth, especially through a backdrop of theater and fandom culture. Claudia’s vulnerability and growth throughout the book make it a worthwhile and heartwarming read for anyone seeking an enjoyable YA experience.