Sri Sai Vrat Katha (set of 11 books) book is one of the best spiritual books. All wishes are fulfilled by taking this book with true devotion on a fast every Thursday and distributing these books to 11 people. The rules of fasting and method of worship are also written in this book, which should be followed during the fast. There is a lot of true story of Sai Chalisa and Vrat in it.