Throughout her adventures, Muller weaves a lively history of the rise and fall of the Incan empire. While the old road is hard to find, the Incan legacy is everywhere, from curanderismo (shamanism) to roundups of golden-fleeced vicunas by villagers spread in human chains to the farming of coca leaves. Her explication of the coca tradition is particularly interesting: the "quintessential Andean sacrament" and the ultimate marker of indigenous identity, chewing coca leaves is akin to sharing a cup of coffee. Of course, she also joins a Bolivian special forces drug patrol in the Amazon to see the more familiar face of cocaine. While Muller doesn't slow down long enough for introspection or much genuine human connection (and you have to occasionally wonder about her cultural sensitivity), she does have a remarkable knack for putting herself in the middle of events, and an unflagging enthusiasm for taking risks most tourists wouldn't dream of. --Lesley Reed