John D’Agata is a champion of the essay, a crusader for lost forms, a defender of nonfiction as an art. The recent publication of The Making of the American Essay, the third volume in D’Agata’s essay-anthology trilogy, shifts his position from expert to shaper; through his curation and introductions to these essays, D’Agata proves himself to be not only a scholar and proponent of the essay but also an artificer of the form. Rather than merely defining the essay for his readers, he enjoins them to write their own definitions.