If you are anyone serious about gold prospecting with a metal detector than you really should look no farther than Larry Sallee's The Complete Unabridged Zip Zip. This book really is the "bible" of all metal detecting books and is two books in 1. It is true that the book does focus much of its use and knowledge around the Whites models and in particulary the Whites Goldmaster models and even more specifically the GMT model with the super nice autotrack and auto ground balance features. This is because in my opinion that detector is probably among the best in the world especially for the price. This book is out of print and extremely hard to find. When you do find it expect to pay anywhere from 150-300 dollars. If you find a few spares online for 100 bucks or less let me know because I will buy all of them up right now. What makes this book so great is the actual detail that the author goes into about cross screening, ground balancing, slight variations in ground and massive time spent on coil control. This book is not like the hundreds of others out there that are 200 pages long and the first 170 of them are about how some guy and his wife were introduced into metal detecting back in the late 70's and how they just fell in love with all the culture and other aspects. It is real technical knowledge with graphs, skethces, measurments, coil desricptions and everything. He goes into exact settings for the detector for particular soil conditions and how to hunt exactly within those conditions. There is a large chapter on mental focus that goes beyond sleeping good and eating your Wheaties everyday. What I am saying is that there is no book on the market for the raw gold hunter using a metal detector that is better--absolutely no way. I don't think anyone who knows anything would argue this either.