I think the books have great moral lessons for kids and adults alike. I rememebr one of them talke about a mirror of desire, which was called desire spelled backwards, and how easy it is to get caught up in wishes of how life shouls be, instead of focusing on what to do that we can actively make life better now. How some people live a life paralyzed by always wishing for things to be different.
I also remember another book discussing how it is a better judge of a man’s character to watch how he treats those that he does not regard as his social equals.
That being said, I think that parents or adults should read the books they encourage or permit their kids, or children under thier influence to read.
I know some peopel panic and wory that kidfs who read the books might start thinking about magic and satanic cults, but the books don’t talk about spells using body parts or sacifices. There is a great emphasis on overcoming evil. Growing up, I liked fantasy books, but never ended up wondering about cults, or practicing magic or using ouja board. I think it was large because I translated that there is a distinct difference between the imaginary and reality, and in the real world, only God is all powerful and that the saints who were in tune with God’s will were/are a parallel to the magic workers in fiction books, and those who sought to thwart the bad guys.