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.
To a child reading the second book, Stefton and Caxton's treatment of Jacob is pretty nasty; it's even worse, however, from the point of view of an adult who is aware of the racial context and overtones.
Caxton's plan to marry nine-year-old Susan is even worse to an adult, who knows what people do when they are married.
Squick: Caxton plans to take over Green Knowe. His plans include marrying nine-year-old Susan.
They Just Didn't Care: In the fifth book, the author admits that she simply made up the witchcraft depicted in the story.