“Do you know your children?” That’s the question that reverberates through the pages of Hyacinth Girls, a debut novel by Lauren Frankel, which the Ridley High School Library received from Blogging for Books in exchange for an honest review. After the death of her best friend, Rebecca took custody of Joyce’s young daughter. Now 13, Callie has been accused of bullying another girl at school. Rebecca is sure it’s all a misunderstanding … Callie would never! But as the puzzle pieces fall into place, Rebecca is forced to question what (and who) she thought she knew. Indelible events from Rebecca’s adolescence are interspersed throughout the narrative, as are transcripts of Callie’s online chats with Robyn (her alleged target), adding teen appeal to this adult novel. A mid-narrative shift to Callie’s point of view cements Hyacinth Girls as a strong crossover read. Frankel enticingly reveals answers to unspoken questions: How did Joyce die? Why are Rebecca and Callie receiving letters from York Correctional Institution? Why is Robyn leaving inflammatory notes at Joyce’s grave? This is an intriguing, suspenseful depiction of two generations of adolescent female friendship and all of its accompanying contradictions and drama. This novel is recommended for fans of Kimberly McCreight’s Reconstructing Amelia and Where They Found Her.