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.
YMMV: The Magids
Ending Fatigue: Everything's wrapped up...so now let's spend 20 pages on what was happening in Babylon while Rupert was waiting.
The Scrappy: Rupert is one of Jones' most disliked protagonists. Granted, part of this is exactly the response she was going for, but it goes a bit beyond that. He's pretty much Rincewind with zero self-awareness.
What Do You Mean, It's Not for Kids?/What Do You Mean, It's for Kids?: This is possibly why blurb copy likes to try and distance Merlin from Secret. Despite being written by a prominent children's/young adults' author, Deep Secret was originally published under an adult label and has more adult themes than most of her other works. (It has a couple instances of rather shocking violence, and a few references to sex, though it's never explicit.) The Merlin Conspiracy is slightly more child-friendly, but not by much.