Answer:
i'd say it's okay to tell ghost stories to children as long as they aren't too graphic. Ghost stories can be fun to tell around the campfire and stuff.
Harry Potter - J.K. Rowling
Lord of the Rings - J.R.R. Tolkien
Wings of Fire - Tui T. Sutherland
Diary of a Wimpy Kid - Jeff Kinney
Percy Jackson - Rick Riordan
Captain Underpants - Dav Pilkey
encouraging readers in the end to look at their world in a more quantitative way