Scientists know aliens exist. And it’s only a matter of time until we find them…or they find us.

Aliens: the Definitive Guide showcases the extraordinary scientists that are currently grappling with questions like: 'Where do aliens call home?', 'Do aliens use warp drive?' and 'Will they be friend or foe?' It’s an all-encompassing guide to everything you need to know about aliens, what to expect and how to prepare for when you meet one.