"We Were Liars" is a young adult novel by E. Lockhart that follows the story of Cadence Sinclair, a wealthy teenager who spends her summers on her family's private island. After suffering a mysterious accident, Cadence struggles with memory loss and attempts to piece together the events of her past summers with her cousins and their friend, Gat. As Cadence uncovers the truth, she confronts themes of privilege, family dynamics, and the impact of secrets. The narrative is filled with twists and turns, leading to a shocking revelation that changes her understanding of her family and their relationships.