PositiveThe Washington PostLike an astronomical Sherlock Holmes, a character often invoked in the book, Loeb concludes that \'the simplest explanation for these peculiarities is that the object was created by an intelligent civilization not of this Earth.\' You don’t have to share his conviction to be impressed by the breadth of his argument ... Loeb is less successful in casting the controversy he has sparked as a sign of myoptic reluctance, within academic circles, to concede that humans might not be the only sentient, spacefaring beings in the universe ... While it’s tantalizing to imagine that ‘Oumuamua was our first brush with aliens, Loeb writes most memorably about collecting shells on the beach with his daughters, brainstorming trippy new studies with his many proteges and seeking comfort in the view of the night sky from our lonely planet. In the end, Extraterrestrial is at its best when it is down to earth.