No. Realistic fiction indicates that the book is something that COULD happen, not that did happen. If there aren't talking animals or magic spells in it, for example, and it's a story about a kid having friendship troubles in school, then it's realistic fiction. The Junie B. Jones series is a great example of realistic fiction in young kids. A factual history about the Titanic would be nonfiction. Characters in realistic fiction are believable and are in a setting of the real world. Nonfiction talks about an event that actually happened and creates no new facts of the event. Does that help?