The present e-book in its second Spanish-language edition - revised and updated from the one published in English by Routledge in 2017 - seeks to explore the relations between Cuba and the United States in the last half century. And it seeks to contribute to the understanding of the conflict between the two countries by examining a contradictory dynamic, in whose background subsist factors of repulsion and attraction, where antagonistic interests coexist alongside zones of mutual cooperation and intelligence. Six residents on the island and another six abroad address each topic and contribute their own perspective.