Along with Darwin's Voyage of the Beagle and South by Ernest Shackleton, Kon-Tiki by Thor Heyerdahl is one of my favorite travel stories. In 1947, Heyerdahl tries to prove that the origin of the Polynesians is from South America by sailing on a raft from Peru to Polynesia. This theory has now been debodied, but it yielded a great story. Through eBay I found this US pocket from 1950 including photos from the raft for a few euros.