Just finished 2 years of traveling and thought someone might be interested in some fairly current English guide books... priced in pesos;
2008 Footprint - South American Handbook (84th edition) $25
2007 Lonely Planet - Bolivia, 9th Ed. (the latest edition) $35
2006 Lonely Planet - Mexico, 10th Ed. - second most current edition $25
2005 Lonely Planet - Argentina, 5th Ed. - second most current edition $25
2008 Footprint - South American Handbook (84th edition) $25
2007 Lonely Planet - Bolivia, 9th Ed. (the latest edition) $35
2006 Lonely Planet - Mexico, 10th Ed. - second most current edition $25
2005 Lonely Planet - Argentina, 5th Ed. - second most current edition $25