"Arabian Sands" is an fascinating book describing travels though the empty quarter in Saudi Arabia and interactions with the Bedouin at a time when their way of life was about to start changing fast (1940s):
Just about to post the same.My copy disappeared but I think it had great photos. There was a vengeful account of a tribe killing a boy left alone. He was trapped inside cliffs with no escape.
Thesiger Said he respected Bedouin more than his Eton chums.
https://en.m.wikipedia.org/wiki/Arabian_Sands