UFOs in a Ranked Soldier's book

Elon Musk once said, "Maybe they(aliens) are among us" .. Moreover, there is a certain strong opinion about that <aliens may appear or disappear just by switching their frequency> that switching idea reminds me the scary characters called -->"Dread Doctors" which are in tv series named Teen Wolf

book:
Torunum Sana Hangi Birini Anlatsam!
E. Korgeneral Doğan Temel