This book is a great example of YA horror that works. Following four female protagonists in a quest to save a loved one, and hopefully everyone else, from a haunted mine that has been ruining (and taking lives) in their town for decades. This book genuinely creeped me out toward the end and I took a small break but wanted to keep reading because it was so engrossing. It's not often that I am genuinely scared by YA/MG horrors. It's fast-paced and keeps you guessing what will happen next. 

Pros: 
- horror without being overly violent or gory 
- strong female friendships 
- different personalities that mesh well and each have strengths 
- fun little interludes that lighten the tone without seeming out of place in the book 
- manages to show complex emotions of teens without reading as melodramatic