Black Chalk By Christopher J. Yates

It was only ever meant to be a game played by six best friends in their first year at Oxford University; a game of consequences, silly forfeits, and childish dares. But then the game The stakes grew higher and the dares more personal and more humiliating, finally evolving into a vicious struggle with unpredictable and tragic results. Now, fourteen years later, the remaining players must meet again for the final round. Who knows better than your best friends what would break you?