Holding a doctorate in Mathematics Education, James E. Riley spent 30 years teaching as a Professor of Mathematics at Western Michigan University after teaching high school math. Additionally, he has served as an officer in the U.S. Army. He has used his experience to author several educational titles, including Helping Your Child with Math, Stand Up Math, and Middle School Math Competition Problems. He has also recently authored our bestselling Super Sudoku series.
Marjorie Eberts and Margaret Gisler have been writing together professionally for 25 years. They are prolific freelance authors with more than 80 books in print. Both Eberts and Gisler received their specialist degrees in education from Butler University, and Gisler is currently completing a doctorate in education at Ball State University.