For over fifty years, Paul Theroux has set the gold standard for travel writing. Now in his seventies, he remains as curious and fearless as ever, as evidenced in his new book, On the Plain of Snakes: A Mexican Journey. The book is an extraordinary chronicle of a hugely ambitious trip Theroux undertook, where he drove the entire length of the US-Mexican border, and then deeper into Oaxaca and Chiapas. Along the way, Theroux spends time with Zapotec mill workers, attends a Zapatista party meeting, and teaches a creative writing class in Mexico City. Through it all, Theroux lends his formidable powers of observation to these areas of Mexico rarely visited by its northern neighbors.