Whenever we envision a world without war, without prisons, without capitalism, we are producing speculative fiction. Organisers and activists envision, and try to create, such worlds all the time. Walidah Imarisha and adrienne maree brown have brought twenty of them together in the first anthology of short stories to explore the connections between radical speculative fiction and movements for social change. The visionary tales of Octavia's Brood span genres - sci-fi, fantasy, horror, magical realism - but all are united by an attempt to inject a healthy dose of imagination and innovation into our political practice and to try on new ways of understanding ourselves, the world around us, and all the selves and worlds that could be. The collection is rounded off with essays by Tananarive Due and Mumia Abu-Jamal, and a preface by Sheree Renée Thomas.