One of Us is Lying Book Set

One of Us Is Lying" by Karen M. McManus is a young adult mystery novel where five high school students are in detention, and only four leave alive. Simon, the creator of a controversial gossip app, dies, and the remaining four students - Bronwyn, Addy, Nate, and Cooper - become suspects. Each has secrets that Simon was about to expose, leading them to investigate Simon's death and protect themselves from the truth coming out