No, and if the company has been treated fairly, you should have no legal problems. However, if the company takes exceptions to any part of your work, you may have a lawsuit for libel on your hands. Even if what you write is true, the company might sue simply as a way of denying what you have written. Books about corporations written without their consent include Disney War and Under the Influence: The Unauthorized Story of the Anheuser-Busch Dynasty. Writers should exercise extreme caution when writing such material and make sure that all facts are verified.