Jacques Roubaud has a book named $\in$, published by Gallimard in Paris 1967. It's not listed on his English wiki page (and is a pain to google if, like me, you've forgotten his name).

Can't add images here yet but here is a link to a pic of the cover:  (French Amazon)

Jacques Roubaud has a book named $\in$, published by Gallimard in Paris 1967. It's not listed on his English wiki page (and is a pain to google if, like me, you've forgotten his name).

Here is a picture of the cover from French Amazon: 

Jacques Roubaud has a book named $\in$, published by Gallimard in Paris 1967. It's not listed on his English wiki page (and is a pain to google if, like me, you've forgotten his name).

Jacques Roubaud has a book named $\in$, published by Gallimard in Paris 1967. It's not listed on his English wiki page (and is a pain to google if, like me, you've forgotten his name).

Can't add images here yet but here is a link to a pic of the cover: (French Amazon)