Harikumar Krishnamoorthy (born 3 January 1989), better known as K. Hari Kumar, is the author of spine-chilling horror and thriller fiction, including That Frequent Visitor, which was the only novel written by an Indian writer to be featured on amazon.com's list of bestselling horror titles. His latest book is 'India's Most Haunted' - a collection of horror short stories published by Harper Collins India. His previous book 'The Other Side of Her' was adapted as the web series Bhram. He has adapted and written screenplay for Bhram (2019) and E (2017).

In 2017, K. Hari Kumar was named one of the top horror writers of India by Desiblitz Magazine. Born in Cochin and brought up in the suburbs of Gurgaon, he did his schooling from DAV Public School, Gurgaon. His first book When Strangers Meet was published in 2013.