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Rating: 
Summary: Well-organized and easy to read
Review: I truly enjoyed reading this book. It is carefully written, has an enormous amount of up-to-date information, and covers the subject reasonably well. Astrobiology is a relatively new subject, and this is one of the best books about it. I was very impressed by the amount of material Ulmschneider was able to cover in only 250 pages and how clearly he explained everything. He went through the origin of the chemical elements, planet formation, the threat of planetary migration, the search for extrasolar planets, planetary atmospheric instabilities, theories on the origin of life on Earth, the evolution of life, the threats to the Earth's environment from the existence of life (such as the Huronic glaciation), the search for extraterrestrial life, and much more. That included some speculative material, some of which I found dubious. But that does not detract from the overall value of this book.
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Summary: Impressive, though technical and mathematical
Review: In this densely written book, Heidelberg University professor Peter Ulmschneider covers a remarkably wide range of questions related to extraterrestrial life and intelligence, and does so with convincing authority. His work, part of Springer's Physics and Astronomy series, has the flavor of a university textbook, with numerous graphs, tables, and diagrams, and a few equations. Readers will need either a basic knowledge of science or a willingness to learn while reading. Part I, about planets, discusses the origin of chemical elements, planet formation, the search for extrasolar planets, and planets suitable for life. Part II, about life, begins at the most basic level of organic chemistry, then moves on to a condensed discussion of biological evolution on Earth. A much briefer chapter provides a quick overview of the search for extraterrestrial life. Part III, on intelligence, takes an unusual approach by beginning with the future of Humankind, emphasizing human expansion into the solar system and possible threats to our survival. Ulmschneider argues that, by thinking about our own future development, we can gain insights into the nature of extraterrestrial intelligence. He concludes his book with a discussion of extraterrestrial intelligent life, briefly noting some of the proposed explanations for the Fermi Paradox. This book is not for casual readers. Because it covers so much territory, the discussions are highly condensed. Nonetheless, Ulmschneider has done an impressvie job. The book includes some small but well-reproduced colored pictures.
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Summary: a complete picture of astrobiology
Review: This book was so dense with information and so elegantly organized that I found it easier than most recreational reading I do these days. The author explains how one might answer what I consider to be the ultimate question: Is there intelligent life elsewhere in the universe? The author refrains from pontificating his own opinion, but rather provides the background information necessary for the reader to draw his or her own conclusions. The basics of planetary science, astrophysics, and biology are presented in the first section, followed by a description of the conditions in which life has evolved, and where elsewhere in the universe we might find such conditons. Part three (the section that I found to be the most fascinating) described the nature of intelligent life and the fate of humanity. As a student studying astrobiology, I found that this book did an amazing job of unifying many of the classes I have taken, and painted a very good picture of Astrobiology as a sigle subject. I would recommend the book to anyone intersted in astrobiology, space exploration, or the future of mankind. The material presented was sufficiently detailed for a student to gain insight, yet presented in such a simple manner that even the casual reader would walk away with and understanding of the contents.
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