Book excerpt: Should we be afraid of UFOs? In June 2021, NASA's boss admitted that "I’ve talked to those pilots, and they know they saw something, and their radars locked onto it, and then all of a sudden it was here, on the surface and then it’s there. And they don’t know what it is, and we don’t know what it is. We hope it’s not an adversary here on Earth that has that kind of technology." The fear? That the "unexplained phenomena" are a sign of an advancement, terrestrial or extraterrestrial, which is part of an aggressive project that is still in its infancy. In April 2022, a Pentagon report counted 57 effects suffered by people in contact with a UFO: abductions by extraterrestrials, brain lesions, paralysis, burns due to radiation, death. Egon Kragel, an outstanding researcher, has investigated dozens of cases where witnesses have not come out of encounters with UFOs unscathed. In a rigorous book, rich with episodes, the author reveals unpublished archives, probes the credibility of testimonies and questions the official thesis that UFOs represent a danger to humanity. No reader will come away unscathed from this new book that will rock the boat of official (un)certainties! Egon Kragel is one of the great specialists in ufology in France. His work is recognized throughout the world, notably by his friend Jacques Vallée who inspired the director Stephen Spielberg for the film E.T. He wrote his first book Ovnis, enquête sur un secret d'Etat. He participates in numerous conferences, appears regularly on television, and takes part in radio programs and podcasts.