The former head of the Pentagon program responsible for the investigation of UFOs—now known as Unidentified Anomalous Phenomena (UAP)—reveals long-hidden truths with profound implications for not only national security but our understanding of the universe.

Award-winning investigative journalist Ross Coulthart has been intrigued by UFOs since mysterious glowing lights were reported near New Zealand's Kaikoura mountains when he was a teenager. The 1978 sighting is just one of thousands since the 1940s, and yet research into UFOs is still seen as the realm of crackpots and conspiracy theorists.

On July 16, 1965, a massive alien spacecraft from the Zeta Reticuli star system landed at the Nevada test site north of Las Vegas. Following a plan set in motion by President Kennedy in 1962, the alien visitors known as the Ebens welcomed 12 astronaut-trained military personnel aboard their craft for the 10-month journey to their home planet, Serpo, 39 light-years away. Working with the DIA originators of the Serpo project and the diary kept by the expedition’s commanding officer, Len Kasten chronicles the complete journey of these cosmic pioneers.

In Dimensions, Dr. Jacques Vallee reexamines the historical record that led to the modern UFO phenomenon and to the belief in alien contact. He then tackles the enigma of abduction reports, which come from various times and various countries, as well as the psychic and spiritual components of the contact experience. In the last portion of the book, he notes the factors that inhibit research into the phenomenon - the triple coverup and political motivations - and concludes that the extraterrestrial theory is simply not strange enough to explain the facts.

Them is the first book ever to examine the intent of the presence known as "aliens" or "visitors" from the perspective of what both civilian and military close encounter witnesses report happening to them.