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The Constant Gardener by John le CarréRead about the other entries on the list.
Old-school British diplomat Justin Quayle is married to Tessa, a campaigner against the shady activities of pharmaceuticals companies in Africa. They meet when the fiery Tessa attends a lecture Quayle gives on Britain's role in the third world. She berates him afterwards, and he naturally falls for her.
The Constant Gardener also appears among Charles Cumming's five best works on espionage.
--Marshal Zeringue