The art in this is beautiful and the layout is generally very good, one minor point is I'd put the explanation of what the wolf-knight is above the random table, so we have that context when reading the table. Both the Backstory and the About this Adventure sections could probably be cut down a bit, and in general some of the writing is a bit wordier than necessary.
I agree with the commentator below that this really needs some way of dealing with the Unspeakable One and lifting the curse! There are hints - the tree, the book, the crystals all seem like they might reduce its power if destroyed - but nothing concrete is stated.