At the beginning of the 2000s, television viewers watched new TV shows like “Survivor” and “American Idol”; they watched “The Matrix”, “The Lord of the Rings” and the second “Star Wars” trilogy in cinemas; children watched cartoons about Pokemon, and the Internet was an uncharted and free territory in which new forms of communication appeared.... and at the same moment a unique, pervasive culture was born that would define the years to come. Henry Jenkins, one of the most respected American analysts in the field of media, his seminal work captures that point of no return, located on the border of two worlds, and prophetically identifies the elements at the origin of the modern era.