The Constant Gardener, written by John le Carré, is a gripping thriller that exposes the dark side of pharmaceutical companies and government surveillance. The story follows Justin Quayle, a British diplomat, as he investigates the murder of his wife, Tessa. Justin uncovers a conspiracy involving a powerful pharmaceutical corporation and the government's complicity in covering up their unethical practices. This suspenseful book raises important questions about the intersection of power, surveillance, and corporate greed.