This is a YA version of a good thriller horror, so basically Pretty Little Liars if it was fantasy.

The premise is really good, and so is the set-up: six girls born in the same day have to reunite cold friendships when they begin to disappear and come back with creepy symptoms.

The writing manages to capture the weird and the gory even in the softer tone of YA, and the world building had a lot of potential. I really wanted to know more about Sorrow and the magic.

But the execution makes it for a weak and superficial story. It's creepy, but the reason is silly. The whole deal with the mothers doesn't make much sense and the ending is very anticlimactic. Overall, it is fun and different but not really memorable.