We are made up of stories, but which ones belong to us? What are the boundaries between our bodies and the outside world? In Autobiography of a Marguerite, the narrator, whose doctor tells her that there is ‘no cause and no cure’ for her autoimmune illness, struggles to separate herself from her troubled mother, the Marguerite of the book’s title. In this profound work about illness and family dysfunction, Zarah Butcher-McGunnigle’s experiments with form – overlapping voices, footnotes, fragments, found text and photographs – illustrate the struggle for autonomy and sense of self, and the repressed grief of chronic ill health. Her writing makes visible the often hidden experience of disability, so that the reader becomes both a witness and an actor, piecing together a narrative that challenges and reimagines what a work of autobiography can be.