I'm not sure how far this joke is worth pursuing, but there was a book (movie?) a while ago called _The Unbearable Lightness of Being_. I've never read it, but when I was casting around for a title for my article, the book title turned up as a potential victim.

My vague impression is that was the book was mainstream, literary, and unlikely to interest me. If it had anything about codes, ingroups or chess, I can't take any credit.