The main author has a background in law and political science and has a strong THEREFORE the book focus on the US regulatory background and the general risk landscape via Smart Grid domain. There is only very sporadic coverage of concrete risk treatment options besides the (valid) observation That security is a process and a journey and not a product.
This book is not meant for smart grid security engineers. But it may be suitable for IT Security Engineers did want to move into the smart grid security business and need to get a first overview. For me the lack of technology depth and the strong focus on the US were a little disappointing. Non US readers are probably better off with other smart grid security books.