Leonard R Heinz has spent more than fifty years studying and reading naval history, and some twelve years researching this book. His is the co-author with Vincent O’Hara of Clash of Fleets, a battle history of the First World War at sea, and Innovating Victory, an examination of fleets adapting to technological change. He also contributed to Fighting in the Dark, published by Seaforth. He lives in Carrales, New Mexico.