Wow. I love thrillers and this one had me on the edge of my seat the whole time. Our protagonist is a senior girl named Pipa who is stubborn and on the hunt for justice. She is a very strong protagonist, albeit a bit foolish at times. Safe Ravi is an amazing balance to her recklessness. 
This was a case that just when you think you have it figured out something throws a twist on the path. It had me on the edge of my seat. 
Keep in mind it is a YA novel and there’s a lot that’s not plausible when solving the case but if you have an imagination and can suspend your disbelief then it’s definitely worth it. 
I do recommend the audio book. It has a full cast and they did an amazing job.