"The Lying Game" is a young adult novel series written by Sara Shepard. The story follows Emma Paxton, a girl who discovers she has an identical twin named Sutton Mercer. After Emma is drawn into Sutton's life, she learns that Sutton has gone missing and must navigate a web of lies and secrets to uncover the truth. The series explores themes of identity, friendship, and betrayal as Emma tries to piece together what happened to Sutton. Throughout the books, readers encounter a cast of characters, including Sutton's friends and family, who all play a role in the unfolding mystery.