"Ensayo Mexicano Moderno" (Modern Mexican Essay) is a seminal work written by José Luis Martínez, a renowned Mexican literary critic and essayist. First published in 1972, this influential book explores the development of the modern Mexican essay, tracing its evolution from the late 19th century to the mid-20th century. This guide provides an in-depth analysis of Martínez's work, its significance, and relevance to understanding Mexican literature and culture.