After just a few moments of reviewing the book it becomes clear that the author has elected to present the "theory" of marine electrical and electronics systems without much information on practical applications of this information. Although this book would make good course material for anyone studying the subject, the term "bible" implies practical information and guidance which is NOT provided in this book. If you are interested in understanding the theory behind the subject, the book could be helpful, if you need practical information on how to diagnose and solve real problems encountered with existing marine electrical and electronic systems, making new installations, or avoiding electrical problems, you'll probably want to look elsewhere.