Under the proper title: "La Confirmation" by Gianni Segre, there are hits for it in any web search engine from all over the world. It's not exactly unknown.
It's available on Amazon.
Segre led an interesting life, and wrote a few works that still merit some attention. Cocaina appears to be his most enduring. Based off of some commentary and reviews, La Confirmation is more explicit than Lolita. It's also more artsy, dreamy, and literary than most chan goers would care for.
As far as I can tell from halfchan's side of things, no one is sufficiently interested and awash in dosh to pony up for a copy. If I'm any judge of these things I'd say an ebook will pop up eventually. Just be patient.