@Mukk comes barreling past @Trailyn after hearing the bookcase move. Expecting an enemy he is only greeted with a dead skeleton. @Brendan grabs the letter from the skeleton while Mukk strips him of his armor, not interested in the chest.
Meanwhile @Ted is channeling his inner pyromanic. He begins to set the small library ablaze. He is thwarted due to the combined efforts of Trailyn and Brendan. Crisis averted.
The letter reads
My most pathetic servant,
I am not a messiah sent to you by the Dark Powers of this land. I have not come to lead you on a path to immortality. However many souls you have bled on your hidden altar, however many visitors you have tortured in your dungeon, know that you are not the ones who brought me to this beautiful land. You are but worms writhing in my earth.
You say that you are cursed, your fortunes spent. You abandoned love for madness, took solace in the bosom of another woman, and sired a bastard son. Cursed by darkness? Of that I have no doubt. Save you from your wretchedness? I think not. I much prefer you as you are.
Your dread lord and master,Strahd von Zarovich
@Fade
The tomes discuss fiend-summoning rituals and the necromantic rituals of a cult called the Priests of Osybus