This is a thorough revision of the 2007 publication, and includes five new chapters and brings all existing chapters completely up to date.  There have been many advances in hydropower and renewable technologies since the original publication, and Europe, and particularly Scandinavia, plan many more in the coming years.  

From a review of the original edition: “… it is important to note that the author deals well with his selected topics. … I recommend this book to all readers who wish to learn more about the economics of hydroelectric power." (Amitrajeet A. Batabyal, Interfaces, Vol. 39 (1), January-February, 2009)