Zibby was joined by sisters Lynne and Val Constantine —the duo behind Liv Constantine who wrote the Reese's Book Club pick, The Last Mrs. Parrish— for an Instagram Live to discuss their latest thriller, The Stranger in the Mirror. They talk about the research that went into writing about amnesia, why the book's suspicious mother-in-law ended up becoming their favorite character, and how their grandmother's life story continues to inspire their narratives today.