Mary Jane Sterling (Peoria, Illinois) is the author of Algebra I For Dummies, Algebra Workbook For Dummies, Algebra II For Dummies, Algebra II Workbook For Dummies, and five other For Dummies books. She has been at Bradley University in Peoria, Illinois for nearly 30 years, teaching algebra, business calculus, geometry, finite mathematics, and whatever interesting material comes her way.