The Constant Gardener, written by John le Carré, is a gripping thriller that combines suspense and political intrigue. The story follows Justin Quayle, a British diplomat, as he investigates the murder of his wife, Tessa. As Justin delves deeper into the case, he uncovers a conspiracy involving pharmaceutical companies, government surveillance, and corruption. This thought-provoking book raises important questions about ethics, accountability, and the power of multinational corporations.