Before we read the books, the introduction will be showed ahead of the stories’ beginning. At first, I get used to the introduction and have the main idea of the stories. But later, as I read more books, I find the introduction is not a good way to help readers to appreciate the charm of the stories. Usually, the readers will get the main idea before they read the stories, because some introduction is very specific, even the ending of the story is being told, so readers will not feel excited and surprised in the process of reading. While if they haven't read the introduction, then every detail of the story will attract them, because they have no idea what will happen in the next chapter. So I advise not to read the introduction, and the unknown plot is full of attraction.