Lyle Cummins continues his series on the internal combustion engine's heritage. Internal Fire, his introductory volume, is in its second edition. The author is uniquely qualified to tell the diesel story. Raised in the family of America's automotive diesel pioneer, his career as a mechanical engineer includes the design, development and marketing of diesel engine retarders and fuel systems for which he was granted five U .S. patents. He has received several notable awards for his writings on I-C engine history. Cummins has devoted over two decades exhaustively researching his subject in corporate and museum archives throughout Europe and the United States to provide this definitive history of the diesel.