Jack Erjavec has become a fixture in the automotive textbook publishing world. He has decades of experience as a technician, educator, author and editor, and he has authored or co-authored more than 30 automotive textbooks and training manuals. Erjavec holds a master's degree in vocational and technical education from The Ohio State University, and he spent 20 years at Columbus State Community College as an instructor and administrator. A long-time affiliate of the North American Council of Automotive Teachers (NACAT), he also served as executive vice-president for the organization and spent several years on its board of directors. Erjavec is also associated with ATMC, SAE, ASA, ATRA, AERA and other automotive professional associations. Ken Pickerill is a Certified Master Automotive Technician (with ASE Area L1 and X1) and an instructor at Southern Illinois University in Carbondale. Mr. Pickerill was a technician for 22 years before entering the training field, and he has more than 40 years of technical and teaching experience. He received his M.S. degree in career and technical education from Indiana State University.