Strange and Mysterious: UFOs

What are UFOs, and has our planet ever really been visited by aliens? Thousands of people every year believe that they have seen evidence of life from other planets, but is there any good evidence for this?
With a mix of intriguing photographs and unsettling illustrations, this book examines real cases of UFO sightings and alien contact claims, presenting possible explanations - both extra-terrestrial and more everyday - for close encounters of every kind.
Read terrifying and often bizarre t...