The gri-gri

Michel O'toll is sailing in the waters of the St. Lawrence River with his friend Hervé Jigger when they fish out an African migrant who has fallen overboard from an ore carrier flying the Belgian flag. Unfortunately, the survivor died of hypothermia after trying to stammer a few incomprehensible words. But a curious amulet that he wears around his neck intrigues Michel O'toll.
However, his quest to know more about the said gri-gri and the tragic death of the expert friend responsible for examining it will lead Michel O'toll to the Republic of Guinea, on the heels of a pretty and intriguing African nurse: Fatoumata Diallo.
In the teeming streets of Conakry, Michel O'toll will meet a strange son of a griot, who will help him elucidate this incredible affair, to which will be added unscrupulous individuals engaging in vile trafficking...