New Delhi, Feb 09 (ANI): I&B Minister Arun Jaitley on Monday released 'India- 2015 Reference annual' in New Delhi. He said that the publication of the book is a great tradition coming from years. He said that the book gives authentic information about 'this great country' year by year. He also said that the digital form of this book will soon be released by the ministry so that the world could have access to the same at no cost.