My Inventions: The Autobiography of Nikola Tesla is a book compiled and edited by Ben Johnston detailing the work of Nikola Tesla. The content was largely drawn from a series of articles that Nikola Tesla had written for Electrical Experimenter magazine in 1919, when he was 63 years old. Tesla's personal account is divided into six chapters covering different periods of his life: My Early Life, My First Efforts At Invention, My Later Endeavors, The Discovery of the Rotating Magnetic Field, The Discovery of the Tesla Coil and Transformer, The Magnifying Transmitter, and The Art of Telautomatics.