These books involve itineraries that would be difficult or impossible to emulate. I choose to list them here based only on the proof of concept they impart; the methodology of understanding the panorama of people and places far removed from one's personal history.
Paul Theroux, one of the best-known travel authors today, takes his routes seriously and does not shy from criticizing both what he sees, and at times, his own limitations. The result rings honestly about the travel experience as a whole. Below are four of his many books that I've found the most enjoyable.
Wilfred Thesiger stands out as a true adventurer of yesteryear. He immerses himself completely in the subject, hence is able to give an exacting description of his experiences and the people he meets. Below are two of my favorite accounts.