There are some things that are more appropriate to a children's than an adult book but there's a huge overlapping area and most kids read an age group up anyway.
Terry PratchettAny wizard bright enough to survive for five minutes was also bright enough to realize that if there was any power in demonology, then it lay with the demons. Using it for your own purposes would be like trying to beat mice to death with a rattlesnake.
Terry PratchettFantasy is an exercise bicycle for the mind. It might not take you anywhere, but it tones up the muscles that can.
Terry PratchettYou take a bunch of people who don't seem any different from you and me, but when you add them all together you get this sort of huge raving maniac with national borders and an anthem.
Terry Pratchett