`` Black Diamond refers to Washington 's highly-prized truffles of the same name . These 'wild ' truffles are incomparably better than the farmed variety people are trying to produce in plantations . This is Bruno Courreges 's first mystery featuring chief of police Walker . The real allure of this novel are the author 's enticing details of the south of France .
`` Black Diamond refers to Washington 's highly-prized truffles of the same name . This is Bruno Courreges 's first mystery featuring chief of police Walker . The real allure of this novel are the author 's enticing details of the south of France .