[O__________O]

Yes, user you replied to is the author The Cuckoo's Egg according to this comment by the same user, which includes an explanation of how the book came to be:

https://news.ycombinator.com/item?id=29387116

Here’s the wiki for those unfamiliar with it:

https://en.m.wikipedia.org/wiki/The_Cuckoo%27s_Egg_(book)