What happens if we had our first encounter with an extraterrestrial technology and we missed it? In this book Loeb argues that it could very well be the case in 2017 when Oumuamua, a interstellar object passed through our solar system only being observed as it exited. Most believe this to be a asteroid but Loeb an astronomer at Harvard argues that it‘s flight path was more characteristic of a technological artefact. A book asking for a more