The Constant Gardener

Blurb

The Constant Gardener is a 2001 novel by John le Carré. It tells the story of Justin Quayle, a British diplomat whose activist wife is murdered. Believing there is something behind the murder, he seeks to uncover the truth and finds an international conspiracy of corrupt bureaucracy and pharmaceutical money.
The plot was vaguely based on a real-life case in Kano, Nigeria. The book was adapted as a movie by the same name in 2005.