The book is about various energy models being used for formulating energy policy at national level especially in India. It not only deals with models used for planning of energy in India since independence, but also presents latest trends and techniques being used in other countries as well. It also lucidly explains the need for such an exercise and the components which affect the energy usage. All those who work in the area of energy planning or are otherwise interested will find it useful. It can be a good reference book for specialized courses in the the field of energy.