Lord Shiva is worshipped in the form of Linga in India in different places from time immemorial. Lord Shiva after being propitiated even by a little worship bestows his devotees their desired fruits. The evolution, development and nobility of twelve Jyotirlingas of Lord Shiva situated in different parts of the country has been described in this book. Attractive pictures of the twelve Jyotirlingas have also been given.