While living in Connecticut Len became the editor of an early New Age publication, Metamorphosis Magazine co-founded with Gordon-Michael Scallion, who has since become well-known as the founder of the Matrix Institute and author of Notes from the Cosmos, and then he became the editor of Horizons Magazine. In 1995, back in Washington and active in the UFO disclosure movement, Len participated in the public protest at the Government Accounting Office for the release of the Roswell files. In 1996, again living in Richmond, Virginia, Len began writing feature articles for Atlantis Rising Magazine.

By this time, deeply involved in UFO research, most of his articles for the magazine were UFO related, although he also wrote about life after death, sacred geometry, Atlantis, free energy, holistic health, and other New Age subjects, much of his knowledge gleaned from his days at the A.R.E. library, his Theosophical studies, and from the store of knowledge of his APS associates and presenters. By 2010, Len had written fifty-two articles for Atlantis Rising, including eight cover stories.

Over that fourteen year period, Len attended the annual week-long UFO Congress in Laughlin, Nevada, where he met and attended the lectures of hundreds of UFO investigators, researchers and writers from all over the world, several of whom he interviewed for Atlantis Rising.

It is now generally recognized that understanding the UFO/ET phenomena requires knowledge of metaphysics as well as analysis of the evidence. Since Len was able to bring his extensive metaphysical background into the writing of The Secret History of Extraterrestrials, the book achieves a depth of understanding of the phenomena not otherwise possible.

The Secret History of Extraterrestrials was basically fourteen years in the making. Len Kasten began writing feature articles for Atlantis Rising magazine in 1996. He has written fifty-two articles since that time, including eight cover stories. Most of his articles have covered the UFO/ET scene as it has evolved. When Inner Traditions reviewed his UFO related articles, it quickly became apparent that they covered a wide and comprehensive view of the subject, and could easily constitute a book that was not simply a compendium, but rather had a clear narrative drive. Consequently, twenty-six articles were selected for inclusion, along with some additional newly written material. Enhanced by the beautiful sci-fi art of Jim Nichols, the resulting book took on a life that no-one had expected. Because of its eclectic nature, The Secret History has a sweep that could never have been achieved if it had been written conventionally. Each chapter covers a subject in depth since it had to stand on its own as an article. And to satisfy the magazine’s relentless requirement for diversity, the entire UFO panorama had to be addressed. The result is a book that is both comprehensive and deep at the same time. Never reluctant to go where others have feared to tread, The Secret History takes the reader on a roller-coaster ride from George Adamski, through Roswell, antigravity aircraft, ET involvement in WWII, a city on Mars, abductions and hybrids, the trip to Serpo, and all the way back to ancient Egypt. You will be dizzy when you finish this book and step back onto terra firma.