"Whatever your viewpoint, this is an excellent guide and introduction to SETI with plenty of insightful anecdotes, glossary, notes, further reading list, and index."-- Starburst Magazine

"All the various solutions to Fermi's paradox are discussed - from the pragmatic to the bizarre - in this clear, concise and engagingly written book. It is a perfect stepping off place for anyone wishing to investigate how far we have come in answering one of the biggest questions in science: are we alone in the Universe?"--BBC Sky at Night Magazine

"A handy, easy-to-read guide to what E.T. might look like, and how we're going about finding him."-- Daily Beast