In previous posts, I have used the capitalized and hyphenized term "Non-Sense" instead of the more common “nonsense,” which can be either a noun or an adjective. However, I prefer Non-Sense, at least for the noun, as it draws attention to both the "negative" side of its referent, and to its duplicity. This is to say no more nor less than is implied by Deleuze and Guattari's concept of "the School."
The main interest for early lovers of Roussel's work, such as the surrealists and Duchamp, was its bizarre content – the impossible tableaux vivants and unlikely narratives in which these were supposedly contextualized and “explained.” However, in the second half of the 20th century, focus definitively shifted to the (deeper) structural logics (revealed in How I came to write certain of my books) that generate these contents as their (surface) effects.
Rich, gay, habitually solitary and a cross-dresser, or better, simply an inveterate dresser-(upper), Raymond Roussel is, along with Antonin Artaud, by far the most well-known fou, if not necessarily its most beloved, at least not by those who consider themselves serious students of the genre. That honor I would argue goes to Jean-Pierre Brisset, of whom more later.