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Title: A readable basic introduction at the high school level
Review: People looking for a simple introduction to the question of extraterrestrial life will find this book easy to read. Physics professor Parker begins with basic descriptions of life on Earth. He then devotes three chapters to Mars, including the possible existence of microfossils in a chunk of Mars that hit the Earth as a meteorite. Parker moves on to extrasolar planets and the radio search for extraterrestrial intelligence. After touching on interstellar flight, he closes with a discussion of the claim that Earth has been visited by aliens. All this adds up to a broad brush overview, leaving out most of the detailed arguments associated with this question. The writing, which avoids equations and elaborate statistics, seems to be aimed at the high school level. Some of the black and white illustrations, particularly the caricatures of scientists, are surprisingly crude.
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