In the Mesopotamian desert during World War I, the leader of a British patrol is shot and killed, by an unseen enemy. The officer is the only one who knows their orders and has not told anyone else where they are located. From then on the sergeant has to try to lead the men through a hostile desert landscape which is full of invisible Arab snipers. One by one they are picked off, and the group of diverse characters from different backgrounds has to try to come together in order to survive. The decision making process proves far from easy as tensions and prejudices from their former lives come to the fore. This thrilling tale of suspense goes right to the last page and was a best seller in the 1920s. The novel was filmed twice, by Walter Summers (as Lost Patrol in 1929) and by John Ford (as The Lost Patrol in 1934).