Andreas Vine's Literatures
This document takes place in a Curse of Strahd campaign played and run by adults. The topics touched can be dark. Curse of Strahd is known for having a rather long trigger list, and it may be worth your time to look into that before reading. That being said, I will update this particular document's specific triggers as I recognize them.
I do expect him to write about his experiences with the following: character death (of friends and allies), kidnappings, hostage situations, mentions of genocide (elven), stalking, manipulation, demons, malpractice / unethical experimentation (with magic), and abuse. This is just what I can see becoming possible in his experience in the story, but they have not yet occurred.
After the Plane Monitoring Initiative was started, Cartier began his work plane hopping and keeping logs on the planes that he travelled to. He has once again embarked on a mission, this time ending up in the land of Barovia, the home of Strahd von Zarovich. This is the journal he has been keeping since his arrival.
This literature will update in 7 in-game day increments, so as to give snapshots of Cartier's weeks in Barovia.