Vikings didn't have books with paper in them - that we know of. However, we'd like to think that some of them would have brought tomes with them from their journeys, decorating them fittingly. This may have been the result: An engraved, elegantly crafted leather bound book with empty pages for you to work on.
Centered on the cover is Yggdrasil - an immense ash tree with branches that extend far into the heavens. It is central and very holy in Viking mythology, and the gods hold their courts there on daily basis. Warden trees linked to Yggdrasil were kept as late as the 19th century in venerated areas of Scandinavia. Offerings were made to the trees, that were considered to be guardians and bringers of luck.