Here is the book as it was found Here is the book as it was foundI'm not surprised that the vellum was preserved in the bog but I am surprised that the ink didn't react with the acids from the bog...or maybe the ink did react and just changed color or reacted with the vellum, rendering the text still readable.
Vellum is incredibly durable. I have several manuscripts on vellum and they are in much better condition than documents on paper that are hundreds of years younger. The ink usually has some fading depending on how much it is exposed to the air. Vellum documents that have been folded against themselves or other sheets of vellum are frequently as pristine as the day they were written because the vellum tends to seal out the elements.
Hopefully we can get high-res photos of the pages as well.