Before the Devil Breaks You: Libba Bray

This was a young adult story where the characters have special powers. The government had created a section of children with special powers hoping to use them as a weapon, but the program was shut down due to some mishaps and the children were released back into society. They are being collected again in order to be used to open the door between hell and earth and unleash " a power never seen before". The kids figure out what is happening after everyone seems to lose their parents/guardians and are able to keep from being used as weapons. Weird but oddly satisfying.