These articles represent the combined efforts of many people with varied orientations to summarize aspects of current research and knowledge relevant for the multitudes attempting to inhabit Earth's warm arid areas, known for their imbalance of natural resources.

The University of Arizona Press's Century Collection employs the latest in digital technology to make previously out-of-print books from our notable backlist available once again. Enriching historical and cultural experiences for readers, this collection offers these volumes unaltered from their original publication and in affordable digital or paperback formats.