New Delhi, July 23 (ANI): Prime Minister Narendra Modi on Wednesday released a biography of Sardar Vallabhbhai Patel in Braille. The biography has been prepared by Dr. A Saibaba Goud, for the benefit of the visually challenged. Dr. Goud also runs the Devnar School for the Blind, in Hyderabad. Bandaru Dattatreya, Member of Parliament, was present on the occasion.