Libyan Desert
Free to read here, from Project Gutenberg.
Mysteries of the Libyan Desert
The journal of Frederick Horneman's travels, from Cairo to Mourzouk, the capital of the kingdom of Fezzan, in Africa, in the years 1797-8
The lost oases
The secret of the Sahara
Wanderings in North Africa
Problems of the Libyan Desert
By the gods beloved