Writing the biography of a well-known person or celebrity without their permission or their cooperation. If the subject is deceased, the book would be written without the help or cooperation of the family or heirs. Writers are free to write such biographies, and publishers will publish them—it is a more difficult process without that help. The problem with writing such books in most cases is the timing. The reading public is interested in any potential subject for a limited amount of time. For that reason, the author must write the book in a very short period of time, and the publisher must get it out and in the bookstores in record time as well. Although it is legal to write an unauthorized biography, it remains legal only as long as make sure that nothing in the work can be construed as defamatory, an invasion of privacy, copyright infringement or any other breach of legalities. For more on the unauthorized biography, go to: http://www.writersdigest.com/editor-blogs/questions-and-quandaries/autobiography-writing/the-difference-between-authorized-and-unauthorized-biographies.