Michael Perryman, 2011. A professional account of exoplanet studies, made by one of the leading expert astronomers.

Chis Kitchin, 2011. A thorough discussion on exoplanets for the science minded audience.

Stephen Webb, 2002. Fifty entertaining solutions to the Fermi paradox and the problem of finding or not finding extraterrestrial life.

Fernando J. Ballesteros, 2010. Describes the problems, possibilities  and opportunities for communication with a hypothetical extraterrestrial civilisation.

H. Paul Shuch, 2011. A collection of essays written by scientists and technicians working with SETI.

Edited by Ron Ekers, Kent Cullers, John Billingham, and Louis Scheffer, 2002.  Contains about fifty expert contributions about how to develop SETI research in the near future.

Edited by Douglas A. Vakoch, 2011. Conference proceedings summarising the status for SETI.

Seth Shostak, 2009. An easy-going and humorous introduction to SETI, i.e. to the search for extraterrestrial life.

Carl Sagan, 1978. A detailed account of the story behind the creation of the golden informational disk that accompanies the spacecrafts Voyager 1 and 2.