Tome of Strahd

It's been interesting to watch the "Curse of Strahd" campaign for Dungeons and Dragons become the equivalent of Chaosium's "Masks of Nyarlathotep".  Both are lengthy, multi-part adventures driven in large part by a plethora of documents and handouts, and gamemasters have embraced expanding the sheer number of props for players to interact with.

This recreation of the "Tome of Strahd" from AdSuccessful1184 is a good example.  They used an off-the-shelf leather journal from Amazon as the base, then customized it with both printed and pasted in pages.  The results are pretty impressive.  Click through on the link above to see an entire gallery of the tome with a lot more of the interior pages.