Journey Without Maps by Graham Greene
Journey Without Maps (1936) is a travel account by Graham Greene, about a 350-mile, 4-week walk through the interior of Liberia in 1935. It was Greene's first trip outside of Europe. He hoped to leave civilization and find the "heart of darkness" in Africa. The interior of Liberia was at the time unmapped (a US Government map had the interior as a large white space marked "cannibals"), and so he relied on local guides and porters.