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During the Second World War, the United States benefited greatly from the espionage collaboration between a well-connected ex-professor of economics, Erwin Respondek, and his contact at the U.S. embassy in Berlin, Sam Woods. The intelligence gathered by Respondek and passed on to the U.S. government included the first detailed and accurate warning about the Germans' plans to invade the Soviet Union in 1941. It also included valuable information about German atomic research, military operations, and secret weapons. This espionage work--here described for the first time--forms an intriguing...

From the late-17th to the early 20th century, intrepid explorers from America and Europe risked (and sometimes lost) their lives exploring the forbidding, uncharted landscapes of the Arctic and Antarctica. What drove these men to undertake these seemingly impossible journeys? In this deeply researched book, author John Dippel makes a convincing case that dozens of polar expeditions were motivated less by courageous idealism than personal ambition and...