Windfall - Michael D. Hartley - Bog

For Fargo-based private investigator, Ryan Moar, the island of Zanzibar is no longer a laid-back tropical paradise. On the exotic East African island, a most unlikely target imaginable, economics professor Jomo Willow, is gunned down by high-priced hit man.
Ryan pays a brutal price for saving Aisling Quinn from drowning in the harbor. She is fleeing from one of the yachts anchor in the bay belonging to a man known only as Shark, who heads a rogue organization of international criminals. Shark is bent on expanding his grip on the drug trade at a frightening pace and eliminating anyone standing in his way. Jomo Willow's assassination is linked to Shark's evil empire. After a devastating cyclone, Ryan discovers Aisling has transmitted Shark's files to Dublin.

Ryan is soon embroiled in a deadly duel against one of the world's most diabolical criminals. While staying one step ahead of deadly assassins, the hunt for Jomo Willow's killer takes Ryan from Zanzibar's narrow alleys to the stately homes of Dublin.