Gerard Helferich, Jackson, Mississippi, is author of four best-selling, award-winning books, including Theodore Roosevelt and the Assassin: Madness, Vengeance, and the Campaign of 1912; Stone of Kings: In Search of the Lost Jade of the Maya; and Humboldt's Cosmos: Alexander von Humboldt and the Latin American Journey That Changed the Way We See the World. Before turning to writing in 2002, he worked as an editor and publisher for twenty-five years in various publishing houses in New York. A member of the National Book Critics Circle, he publishes book reviews in the Wall Street Journal.
