Principles of Extreme Soil Microbiology.- The Microbiological Promises of Extreme Soils.- Microbial Diversity, Life Strategies, and Adaptation to Life in Extreme Soils.- Extreme Views on Prokaryote Evolution.- Biodiversity: Extracting Lessons from Extreme Soils.- Natural Extreme Soils.- Halophilic and Halotolerant Micro-Organisms from Soils.- Atacama Desert Soil Microbiology.- Microbial Communities and Processes in Arctic Permafrost Environments.- Aerobic, Endospore-Forming Bacteria from Antarctic Geothermal Soils.- Peatland Microbiology.- Subsurface Geomicrobiology of the Iberian Pyritic Belt.- The Potential for Extant Life in the Soils of Mars.- Anthropogenic Extreme Soils.- Bacteriology of Extremely Cold Soils Exposed to Hydrocarbon Pollution.- Microbiology of Oil-Contaminated Desert Soils and Coastal Areas in the Arabian Gulf Region.- Microbial Communities in Fire-Affected Soils.- Endophytes and Rhizosphere Bacteria of Plants Growing in Heavy Metal-Containing Soils.- Interactions of Fungi and Radionuclides in Soil.