Writing a book, whether good or bad, is hard work and can be done in several different writing fashions. Anyone can create a book; however, they have to choose what path they desire to take concerning writing styles. Many things dictate different styles, from socioeconomic status to desired readability to location; for example, British writers differ from U.S. writers. There are writers inclined to be didactic and those who are inclined towards upbeat and comical prose. No matter what you wish to write, determine a style before you begin.
The natural inclinations of a writer generally comes out in the writing. From word usage to the way sentences are structured are determined, usually, by the writer's own background. A U.S. writer may use the word "lots" to describe a great deal of something, while an Australian writer might use "heaps" instead to describe the same thing. Socioeconomic background, race or religious background may all affect writing in the same manner, just as they affect the writer him- or herself.
While it is the normal human inclination to use personal pronouns in the past, present or future tense, some writers choose to use third-person pronouns, referencing the main characters by their names or by him, her or their. This distances the reader from the protagonists or antagonists of the book and allows them to become less emotionally involved with the individual and able to take in the story in a more holistic manner. Using first-person has the opposite effect, where the reader feels very connected with the individual, as they are carried through the story with the person who is speaking.
Using persuasive writing in a book inclines the reader one way or another concerning an issue, situation or character. The author already tries to make up the reader's mind concerning these things in either a positive or negative manner. Persuasive writing is effective when the author is attempting to get a message out or accentuate a point. This works well in books which are arguing for or against a situation, such as those concerning global warming, for example. It is also often used in advertisements, to have the consumer purchase a particular product.
Hemingway is the classic example of the artificial writing style. Deliberately placed words and language that is not completely normal for a certain individual or situation are characteristic of artificial writing styles. Even JRR Tolkien's "Lord of the Rings" trilogy can be classified as such, for many of the characters would not talk in the same manner if they were human, living in England during Tolkien's life. Artificial language can be used to distinctly separate a character or situation from others in the book or from normal life itself.