Arcadia: The Final Conclave

A great deal of dark-matter hit the earth wiping out most of it's population. The people who survived lived in tribes. They were mixture of black and white people who lived in harmony. Laws were made and no one cares break them.
Like every great civilisation, they needed a leader, a warrior, a commander, a king.
So after the death of every king, they select one member from each of the seven tribes and have a conclave, a fight to the death and only one person stands and that person becomes their king or queen.
That was until a new threat arise, they found out they were not the only ones who survived and they must fight this new threat to keep the only supporting valley on Earth.

But this new threat is untouchable and if that's not worst, a piece of rock falls from the sky containing a heavy amount of dark-matter and changes the lives of the conclave forever. But it's not their lives only that is changed.

This is a book about survival, more like the 100 if you have seen it before.
Hope you all like it and it's soo interesting.