Free copies of Sri Venkateshwara Vratha Kalpam, written by T.V.R.K. Murthy (Viswapathi), are being distributed to devotees at the ninth Sri Venkateshwara Swadhyaya Gnana Yagnam at Tirumala Tirupathi Devasthanam premises at Himayatnagar here. Those interested in the copies could contact the author on 9849443752, a press release said.