Artificial Intelligence: The Retreat
Yet, Dr. Bostrom, in an afterward, written in November 2015, to the paperback version actually backs off his initial forays into the dangers of AI, as the end-of-mankind-singularity.
And why did he do so?
Here's a clue from that afterword:
"It is no part of this book's argument that an intelligent explosion is imminent ..." [Superintelligence, Page 322]
"Those inane Terminator pictures are taking a toll. It can't be much fun to have aspersions cast on one's academic discipline." [ibid., Page 323]
Apparently, pressure from Bostrom's peers (and bosses?) have suppressed his one-time view that an AI Singularity was, indeed, imminent and would take control of mankind, eliminating the human species along the way.
I see his original Singularity, and that of Barrat, Kurzweil, and others as a distinct possibility, and continue to suggest the idea that UFOs may be AI machines or contain AI machines, and that they have been and are reconnoitering Earth, like von Neumann probes.