One of the best-selling books on relationships in Spanish during the last two years, studied and discussed by consensual non-monogamy activists and polyamory groups throughout one of the European countries where this proposal, born in Sweden in 2005, is having the most significant impact and acceptance, has been translated and adapted here to bring to the English-speaking audience a less self-centered and more radical framework for sustainable interpersonal relations based on intense communication and free, conscientious commitments. The original title was published in Spain in the spring of 2020. Since then, one edition after another has sold out (in November 2022, the fourth edition hit the bookstores), obtaining a rating of 4.33 on Goodreads, and translations into other languages and publishing projects in other countries have been released, showing that there was and still is a global need to know and understand alternative structures when it comes to relating to each other. The most enthusiastic reception of this monograph has been in those communities already interested in these relational alternatives to the hegemonic monogamous system and groups more focused on lifestyle-politics activism of anti-patriarchal, anarchist and anti-capitalist inspiration. Reading sessions, analysis courses, seminars, and workshops of varied scopes, extensions, and approaches have been organized. Likewise, these topics have been collected in press articles, radio and TV programs, interviews, podcasts, and other digital and printed formats. This translation maintains most of the original content, adapting only the necessary contextual elements so that English-speaking readers can interpret the examples, references, comparisons, and anecdotes with greater familiarity. The book's audience covers various profiles regarding age, gender, sexual orientation and preferences, geographical and socio-cultural origin, etc. One reason is that the work brings together both visions: political and relational. It historically structures the elements leading to the emergence of this framework, starting with the philosophical and political theoretical foundations, the freethought tradition, social developments, feminist, queer, sex-positive activisms, etc., while also addressing more personal aspects. The feedback from readers suggests that this volume has inspired and helped them not to "feel like weirdos" and to have pride and confidence in their decisions and choices regarding rela