Predatory open-access journal publishers have increased exponentially in recent years, and a new publisher can be created in a single day, said Jeffrey Beall, a scholarly librarian at the University of Colorado Denver, and author of Scholarly Open Access, a blog that tracks and critically analyzes questionable open access publishers and journals. To help you avoid becoming a target of one of these predatory publishers, Beall offers 6 warning signs to help you identify them.