Confessions of an Alien Hunter : A Scientist's Search for Extraterrestrial Intelligence

Selected by Extraterrestrials: My life in the top secret world of UFOs, think-tanks and Nordic secretaries

Messages: The World's Most Documented Extraterrestrial Contact Story

Messages : The World's Most Documented Extraterrestrial Contact Story

Alien Universe: Extraterrestrial Life in Our Minds and in the Cosmos

Star People, Sky Gods and Other Tales of the Native American Indians

Lonely Minds in the Universe

Science, Religion, and the Search for Extraterrestrial Intelligence

Confessions of an Alien Hunter: A Scientist's Search for Extraterrestrial Intelligence

Signatures of Life: Science Searches the Universe

Civilized Life in the Universe: Scientists on Intelligent Extraterrestrials

The Eerie Silence: Renewing Our Search for Alien Intelligence

Contact with Alien Civilizations: Our Hopes and Fears about Encountering Extraterrestrials

The Eerie Silence: Renewing Our Search for Alien Intelligence

Extraterrestrials: A Philosophical Perspective

Confessions of an Alien Hunter: A Scientist's Search for Extraterrestrial Intelligence

Life In The Universe

Messages: The World's Most Documented Extraterrestrial Contact Story

Cosmic Voyage: A Scientific Discovery of Extraterrestrials Visiting Earth

The Eerie Silence: Renewing Our Search for Alien Intelligence

Lonely Minds in the Universe

Civilized Life in the Universe: Scientists on Intelligent Extraterrestrials

All These Worlds Are Yours: The Scientific Search for Alien Life

Science, Religion, and the Search for Extraterrestrial Intelligence