One way to find a large audience and topic to write about is to ride the coattails of another’s success. Celebrities, hot fad items, musicians, movies, politicians, games and many more will qualify. When you write about such a subject, especially one that is really popular or known by just about everyone, you have a huge market at your disposal. An example is the game of Monopoly. Hugely successful, and someone wrote a book about the game to capitalize on the people interested in the game. If you are dealing with current events or things that are widely publicized, you already have free publicity. People interested in the subject will eventually search or browse around on the subject and will likely run into your book.
Nonfiction Ideas
Nonfiction Book Ideas, Articles, Blog Posts, etc.