babu devaki nandan khatri--(1861-1913)was the first author of mystery novels in hindi.he wrote Chandrakanta , chadrakanta santati , kajal ki kothri , narendra-mohini , kusum kumari . virendra veer , gupt godna and Bhootnath
he made a strong contribution to the learning of hindi language by the people of thr time . People were so mermerised by his works CHANDRAKANTA , CHANDRAKANTA SANATI and BHOOTHNATH that they started learning hindi just to be able to read his work
there r six volume of bhoothnath