SE thesis

Fear, as any other feeling, is hard to define. If someone ask a ten years old kid what he is afraid of, he will give an example, but if he is asked about a definition, he won't be able to say. But all of the four books have something in commom when it's related to fear, it makes the reader able to define as "something that make someone be what he/she isn't, or make things he/she didn't want to."