is a self-written account of one's life. Takes stock of the autobiographer's life from the moment of composition. While biographers generally rely on a wide variety of documents and viewpoints, autobiography may be based entirely on the writer's memory.

is a detailed description of a person's life. It involves more than just the basic facts like education, work, relationships, and death; it portrays a person's experience of these life events. Unlike a profile or curriculum vitae (résumé), a biography presents a subject's life story, highlighting various aspects of their life, including intimate details of experience, and may include an analysis of the subject's personality.

writing that uses literary styles and techniques to create factually accurate narratives. Creative nonfiction contrasts with other nonfiction, such as academic or technical writing or journalism, which is also rooted in accurate fact but is not written to entertain based on prose style. Many writers view creative nonfiction as overlapping with the essay.

letter is a written message conveyed from one person (or group of people) to another through a medium. [1] The term usually excludes written material intended to be read in its original form by large numbers of people, such as newspapers and placards, although even these may include material in the form of an "open letter".

books in the reference nonfiction genre contain relevant information on a subject and where you can go to learn more about that subject. The books in this genre can be about anything people might need to know about. They can be marketing guides for writers or lists of travel destinations in a country or area – anything where one can list information in an easy to use way to help people find the information on a topic.