The little data I have about them suggests they are not out for our best interests. As irresponsible as this may seem, these beings are 100 percent extraterrestrial, and have nothing to lose by our lack of spiritual growth. They are infrequently reported by abductees as originating from other less friendly planets in our present century. I do not argue this point, but they also exist in our future and travel back in time. These time travelers are most definitely to be avoided, as they appear to be cannibalistic.
All time travelers wear jumpsuits or robes of some sort.
Their own species are often dying out, which is why they conduct experiments on us. Throughout this book, the principles of hyperspace engineering and traveling through the fifth dimension from the future to the past and back are discussed. The theoretical model of time travel without time machines per se is thoroughly discussed by referencing the work of Kip Thorne, Steven Hawking, John Wheeler, Roger Penrose, Edward Witten and others.