(A) Satyarth Prakash is an 1875 book written originally in Hindi by Maharishi Dayan and Saraswati, a renowned religious and social reformer and the founder of Arya Samaj.It is considered one of his major scholarly works. The book was subsequently revised by Swami Dayan and Saraswati in 1882 and has now been translated into more than 20 languages, including Sanskrit and several foreign languages like English, French, German,Swahili, Arabic and Chinese.