A bestselling young adult mystery thriller by Holly Jackson and the first book in the A Good Girl's Guide to Murder trilogy. The story follows Pip Fitz-Amobi, a smart and determined high school student who chooses to investigate a closed murder case for her final school project.

Five years earlier, popular student Andie Bell was believed to have been murdered by her boyfriend, Sal Singh, who then apparently took his own life. The case was considered solved—but Pip isn't convinced Sal was guilty. As she begins interviewing witnesses and uncovering overlooked evidence, she realizes someone in her quiet town is desperate to keep the truth buried.

What starts as an academic project quickly becomes a dangerous investigation involving hidden secrets, lies, corruption, and murder. As Pip gets closer to the truth, she finds herself in increasing danger, forcing her to risk everything to uncover what really happened.

Blending interviews, text messages, case notes, and traditional narrative, the novel creates an immersive reading experience. With its intricate mystery, memorable protagonist, and surprising twists, A Good Girl's Guide to Murder has become one of the most popular YA thrillers of recent years.