These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
The Red Kitchen Reader becomes a lot creepier when you realize the author's description of the "Red Kitchen" in Cheydinal closely matches the Cheydinal Dark Brotherhood Sanctuary.
The Twist Ending of A Dance In Fire where both of Scotti's contacts in Valenwood end up becoming a main course was a rather nasty surprise, but upon looking back the reader will notice some disturbing foreshadowing as early as the end of chapter 5. When Scotti finally finds Jurus and Basth both are noted to be extremely fat and Jurus in particular mentions never having turned down food when it was offered to him. In other words, the Bosmer were fattening both men up and likely planning on eating them long before Scotti even arrived!
The 36 Lessons of Vivec. Somebody must have found some interesting substances before writing those.
Whiskey, cigarettes, sleep deprivation, a single-session read of Alistair Crowley's The Book Of The Law (of which the 36 Lessons contains several direct references such as 'I am not of the slaves that perish") and being naked in a dark room lit only by the glow of a word processor on a computer screen is the apocryphal account of how Kirkbride came up with it. Unknown whether this is true.
Ruminations on Elder Scrolls in Skyrim was actually written by an author who was on something. An actual Elder Scroll is, apparently, one hell of a drug.