Extraterrestrial is a provocative and fascinating book written by American theoretical physicist and Harvard University astronomer Avi Loeb. 

In Extraterrestrial, Loeb takes readers inside the thrilling story of the first interstellar visitor to be spotted in our solar system. 

“He outlines his controversial theory and its profound implications: For science and for the future of our species and our planet,” said a review in goodreads.com.

A mind-bending journey through the furthest reaches of science, space-time, and the human imagination,  extra-terrestrial challenges readers to aim for the stars— and to think critically about what’s out there, no matter how strange it seems. 

The book examines the case for finding extraterrestrials and looks in detail at Oumuamua, the strange object that passed through our solar system in 2017. Loeb details how the shape and behavior of Oumuamua was incredibly irregular. 

“The evidence that the author presents for the intelligent design of Oumuamua is compelling, and provokes a lot of interesting thoughts,” said the review,

“The central idea presented in this book is well thought out and carefully presented.”