Barry Schoenborn is the author of “Math For Real Life For Dummies,” and coauthor of “Technical Math For Dummies,” “Medical Dosage Calculations For Dummies,” “Physician Assistant Exam (PANCE) for Dummies,” and “Storage Area Networks: Designing and Implementing a Mass Storage System.”

He was a movie reviewer for the Los Angeles Herald-Dispatch newspaper and wrote a monthly political newspaper column for The Union newspaper of Grass Valley, California, for seven years.