I am not a machinist and buying this book, based on what I wanted from it and the cost, I do feel it presents a good basic understanding of the Milling Machine and it's use.  This book provides the necessary information and explanations of the machine and it's basic operation.  I gives the reader the basic layout of the milling machine, it's use and operation. This is what I needed to know.  I wanted to have a basic explanation of the machine, some information on setup and use and some information on milling tools and their use.  This book gets me started to understand what the milling machine entails, it's operation and it's use.  I feel it is worth the price paid to have as a reference book.