The Constant Gardener, written by John le Carré, is a gripping espionage novel that explores the intersection of politics, pharmaceuticals, and surveillance. The story follows Justin Quayle, a British diplomat who investigates the murder of his wife, Tessa. As he delves into the conspiracy surrounding her death, he uncovers a web of corruption and surveillance that reaches far beyond what he could have imagined. The Constant Gardener is a suspenseful and thought-provoking book that shines a light on the dark underbelly of global surveillance.