One River

Best known for The Serpent and the Rainbow, Wade Davis is an ethnobotanist interested in the native uses of plants, especially psychotropics. He finds many such plants in the travels he recounts in One River, especially coca and curare. (The first, famously, is a curse in the First World but is a necessity in the Andes, where it promotes the digestion of many kinds of food plants.) Framing Davis's narrative is an account of the dangerous World War II-era Amazonian expeditions undertaken by his mentor, Harvard biologist Richard Evans Schultes. Davis describes a few hair-raising encounters of his own, making this a fine book of scientific adventure.