...has there been anything else mentioned about a book and CD combo that was rumored when this whole thing jitterbugged down the development trail?....
Scott- I purchased mine from CD with a special offer way back when. It had the CD's/ DVD/ and a paper Libretto all done up nicely in case. I've since gifted it to a dear friend so do not have it in hand. If I'm not mistaken, this item from Amazon has the libretto in pdf form on one of the disc. That's the closest to a "book" that I have seen.
Amazon.com: Ghost Brothers of Darkland County [CD + DVD Deluxe Edition]: Music