Dr. Brett Johnson spent twelve years in the Porsche parts business and seven years practicing veterinary medicine. Now a writer, he has published several notable books on Porsches, including The 911 & 912 Porsche, a Restorer’s Guide to Authenticity, and The 356 Porsche, A Restorer’s Guide to Authenticity, which has sold over 45,000 copies worldwide and is now in its fourth edition.