Good Girl, Bad Blood by Holly Jackson

Pip Fitz-Amobi has moved on. The murder case that consumed her life—and her true-crime podcast—is solved, and she has publicly sworn off detective work for good. She's trying to be a normal teenager, focusing on college applications and spending time with her boyfriend, Ravi. But the past isn't done with her yet.

When a friend of Jamie Reynolds's brother comes to Pip in desperation, claiming Jamie has vanished without a trace and the police won't take it seriously, Pip is reluctant to get involved. But as she starts asking just a few questions, she uncovers a pattern of other missing persons in the area that the authorities have ignored. She can't walk away.

With Ravi by her side, Pip launches her own investigation, secretly documenting everything for a new, unpublished podcast. As she digs deeper, she realizes that the case is far more complex and dangerous than a simple runaway. The closer she gets to the truth, the more she puts herself and everyone she loves in jeopardy. In a stunning and heartbreaking conclusion, Pip's relentless pursuit of the truth leads her to a discovery she never expected—and a danger she can't escape.