José Endoença Martins, an Afro-Brazilian novelist, essayist and academic researcher, has published more than 20 books involving literary experiences of authors of African descent. He has got Ph.Ds in both Literary Studies and Translation Studies. His researches include Gates's concept of Signifyin(g) and its implications on black literature.

"Signifyin(g) upon Toni Morrison's Postblackness" is a collection of academic texts on the novels of African-American novelist Toni Morrison, who has been awarded the 1993 Nobel Prize of Literature. Her novels - The Bluest Eye, Song of Solomon, Tar Baby - are critically discussed under the auspices of three distinct concepts: Negriceness, Negritude and Negriticeness. These concepts work as theoretical attempts to measure both interracial and intrarracial proximity of the novels' major characters with both black and white cultural worlds and values. Thus, regarding The Bluest Eye, its Pecola Breedlove is studied from the perspective of Negriceness, which explains her wish to possess blue eyes. Concerning Song of Solomon, Milkman Dead is evaluated from the point of view of Negritude, which justifies a personal search for his family's ancestors and the legend of the flying slave, in the Southern US. Finally, as for the gaze of Negriticeness, Tar Baby's Jadine Childs associates her double-voiced blackness with her life between both the black Childs and the white Streets. In the end, Morrison's postblackness signifies upon the sum of all our blacknesses.