This book is about digital media. Even more, the book is about us. It explains how the ever-growing flood of digital media affects our perceptions of the world, change our behaviors and eventually transform our very existence. In the era of Facebook, Twitter, Google, and Apple, being online is the standard. We spend many hours a day gazing at our screens, traversing the virtual realm, and posting our tweets, tags, and "likes." Billions of years of evolution have prepared us for life at the savannas. It took us less than two decades to radically transform our biotope. Being online is no less than a fundamentally different mode of being. It is likely to produce a fragmented, detached, and distorted view of the world. What will be our understanding of the world when all certainties that result from living in a material world become useless? What will be our role and position when computer intelligence surpasses human intelligence? How can we avoid losing grip of the significance of identity, friendship, social engagement, and eventually life at large? The book explains the mechanisms and consequences of engaging in online spaces. It offers an accessible means for attaining a better understanding of the ways digital media influence our lives. It is a compact guide to becoming media literate and to preparing us for the advanced digital services that are yet to come. This makes the book an indispensable aid for every twenty-first-century citizen.