"[...] written for people with a strong background in science. I nonetheless found it a joy to read and I would strongly recommend it to those who wish to know the latest in the scientific search for ET." (Neil English, Astronomy Now, Aug. 2003) "[...] Astrobiology challenges science in unique ways, in particular the well-known problem of identifying life when we only have one prototype to work from, and I am sure that newcomers to this field and established workers will both find this book very rewarding." (International Journal of Astrobiology, 2002) "It is a real pleasure to come across a volume like Astrobiology." (Biologist, 2002)