This book introduces readers to Critical Organic Writing (COW), or ECO in Spanish, a feminist decolonial methodology that reimagines writing as a pulse of memory, embodiment, and shared world-making. Rather than accepting writing as neutral description, COW/ECO positions it as a relational act in which writer, reader, and past speak through each other, weaving resonances across geographies and generations. Grounded in borderland epistemologies and intersectional critique, COW/ECO affirms vulnerability and affect as generative sites of knowledge and challenges traditions that silence voices shaped by race, gender, migration, and class. Writing thus becomes a form of ethical witnessing and reparative justice, a field where marginalized stories return with renewed cosmological force. This book offers trauma-informed prompts that awaken memory without violation, generative exercises that braid imagination with testimony, and dialogic writing guidelines that resist extractive authorship. Its tools emerge from community projects and pedagogical experiments that honor multilingual expression, embodied critique, and collaborative meaning-making. Responding to a pressing need for alternative writing methods that empower marginalized voices, it will be of interest to academics, students, and educators engaged in feminist theory, critical race studies, and decolonial studies.