From the reviews:
"This hefty volume ... is the sixth in a series dealing in cellular origin and life in extreme habitats and astrobiology. ... Thus, it covers an enormous range of topics ... . The advantages ... include a topicality and a constant reminder of the many exciting frontiers under active investigation. ... it contains a number of excellent reviews ... . In conclusion, this book is a must for all students of astrobiology ... ." (Simon Conway Morris, Geological Magazine, Vol. 142 (2), 2005)