This one comes from a novel I'm reading, Lisey's Story by Stephen King. The word as he uses it, incuncabilla, isn't one I could find exactly, but it is how the main character hears the word.
I think the actual word is incunable or incunabulum, either of which is completely new to me, maybe you won't know it either.
in·cu·nab·u·lum , (nky-nby-lm, ng-) n. pl. in·cu·nab·u·la (-l)
1. Bands holding the baby in a cradle
2. A book printed before 1501; an incunable.
3. A work of art or industry of an early period.
Either way, it's certianly an unusual work, seeming to date to the 1860's in first use. Somehow, I don't quite see how it's going to come up in my daily writing, but what a killer word to know for a Scrabble game!