Thor Heyerdahl wrote expedition and travel nonfiction built around attempts to test theories of ancient migration by recreating possible voyages. Kon-Tiki recounts his Pacific crossing from Peru on a balsa-wood raft, undertaken to demonstrate that pre-Columbian South Americans could in principle have reached Polynesia. The Ra Expeditions follows later attempts to cross the Atlantic in reed boats inspired by ancient construction methods, while Aku-Aku describes archaeological investigations and travel on Easter Island. Heyerdahl's books combine field adventure, practical problems at sea and arguments about cultural contact, although many of his broader migration theories remain disputed by modern archaeology and genetics. They fit exploration, maritime adventure, archaeology history and classic travel writing. Read more Less