Mexican artist Felipe Ehrenberg’s cre­ative activity was propelled by an indefatigable drive for experimentation and an unyielding commitment to the expansive possibilities of art. Preferring the self-­defined descriptor of “neologist”—one who explores new ideas—to “artist,” he developed a diverse and influential body of work encompassing performance, mail art, artists’ books, and paintings that probed art’s role in society. Published in conjunction with the 2021 ISLAA exhibition Felipe Ehrenberg: Testamento, this illustrated booklet includes an essay by scholar Néstor García Canclini on Ehrenberg’s work, in English and Spanish. It features full­-color images of the thirty-­four collages in Testamento (1968–2017), a retrospective assemblage of documents, photographs, writings, and drawings compiled at the very end of the artist’s decades-long career.