"A Good Girl's Guide to Murder" is a young adult mystery novel by Holly Jackson. The story follows Pippa Fitz-Amobi, a high school student who decides to investigate a closed murder case involving a local girl, Andie Bell, who was believed to have been killed by her boyfriend, Sal Singh. Pippa's curiosity leads her to uncover secrets that challenge the town's narrative. As Pippa delves deeper into the investigation, she faces various obstacles and dangers. The novel explores themes of truth, justice, and the impact of rumors, while highlighting Pippa's determination to seek the real story behind the tragedy.