"Journey into a Dark Heart" begins by introducing David Rehn, a young Dane (citizen of Denmark), who is attending the 1929 dedication of a new railway line. The railway runs from the western coast of Africa in Cabinda through the Belgian Congo and deep into the heart of the continent. The dedication includes many representatives of royalty and international business, and the grand display reinforces David's view that European civilization is indeed great. David has come to this event as a fluke, having acquired a position with a global trading company after he gave up his lifelong pursuit of mathematics. David had always relied on the stability of mathematics to get him through any emotional crisis until one year earlier, when he met Kurt Gödel, a mathematician whose ideas were bound to shake up the world of mathematics. With his passion for mathematics threatened by...