The 1st Edition of The Ethnographic Case, published in 2017, was an experiment in post-publication peer review, with the book published online and open to comments from readers. In this new 2nd edition, to be published later this year, the editors and authors have updated the text, both in response to these comments and taking into account changing contexts in the years since the book’s first publication. The Ethnographic Case: A doctor injects turpentine into the leg of a dying patient; the patient lives and years later a granddaughter uses this story of survival to write a story of her own. A refugee is questioned in court for falsifying paternity; a cultural expert intervenes to develop a legal case for kinship that exceeds DNA. The actions of a caring father pose a dilemma for how a filmmaker represents Ecuadorian sex workers. In all three chapters, “the case” shapes possibilities for action. In each chapter, the practice of case-making is also specific to the details of the case. The Ethnographic Case challenges a widespread academic inclination to treat concepts as immutable mobiles.