The author is astrosociologist-contactor and possesses a wide experience of contacts with aliens. As a result of contacts the author received valuable information from representatives of space system ETA. In the book the unknown to science chronological, information and biophysical anomalies caused by activity of system ETA are described and investigated by methods of mathematical statistics. The book received positive comments of leading scientists of Russia. Results of research are published in a big series of articles in the magazines recommended by the Highest Certifying Commission of Russia, in the international scientific magazines, in the journals of the Russian Academy of Sciences and in reports at international scientific conferences.