The Poisoned Island — Lloyd Shepherd

Tahiti 1769. English sailors arrive on the shores of the Polynesian paradise -- a place of staggering beauty where magic and ancient myths still hold sway. But they soon devastate the island with disease, war, and death, planting deadly seeds that will be carried back to England forty years later.

London 1812. On a gray June morning, the Solander docks, her hold containing hundreds of exotic plants from Tahiti for the King's Gardens at Kew. The apparently successful expedition soon takes a horrifying -- and inexplicable -- turn: The crew of the Solander starts dying one by one. Thames River Police Chief Charles Horton can find no signs of murder or suicide to explain the deaths, and the ship's surviving crew seems intent on hampering his investigation. When one of the plants begins to show frightening changes, it is up to Charles Horton to determine how it might be stopped.