Book - Traitors: The Ultimatum Game of Cunning Logic / Intuition

Put your sleuthing skills to the test in a world of deception, betrayal, and strategy. Placed in a castle in the Scottish Highlands, you must figure out if your fellow players are Faithful or a Traitor. Can you trust Jorge, the dentist with an encyclopaedic memory and tendency to smile at everyone? Or Nina, the retiree who acts like the group's matriarch but has a knowing glint in her eyes..? Beware, for in this treacherous game, trust is a luxury you cannot afford.