Indeed, Venkatadhvari's 17th century Sanskrit work Raghava Yadaveeyam narrates the story of Ramayana (left-to-right) and Mahabharata (right-to-left) simultaneously.
http://www.sanskritebooks.org/2009/09/raghava-yadaviyam-with...
http://www.sanskritebooks.org/2009/09/raghava-yadaviyam-with...
For example, http://www.independent.co.uk/news/weird-news/14yearold-floor...
> They were a whole genre of poems called "adhama kavyas." Literally, in Sanskrit, it means 'inferior poems'.