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James E. Duffy has devoted much of his professional life to developing educational materials that help people understand vocational and technical subjects. Mr. Duffy earned a Bachelor of Science degree in Industrial Technology from Indiana State University. After college, Mr. Duffy worked as an automotive instructor at Brandon High School in Brandon, Florida, and at Hillsborough Adult Education Center in Tampa, Florida. After teaching for several years, Mr. Duffy joined Goodheart-Willcox Publisher as a technical editor and eventually began writing textbooks. In addition to Auto Electricity and Electronics, Mr. Duffy's books include Modern Automotive Technology, Auto Engine Repair, Automatic Transmissions and Transaxles, and Manual Drive Trains and Axles.
 
 Dr. Chris McNally is a highly respected educator and department chair from Hudson Valley Community College in Troy, NY. Chris is Department Chair and Professor of Applied Technologies, overseeing students in degree and certificate programs in auto service, clean energy, electricity, HVAC, and refrigeration technology. He has won teaching awards and has been successful in creating and advocating for new programs related to emerging technologies, including electric charging systems. 
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