Yoga Vasistha is claimed to be written by Valmiki ji.
The first written copy of Yog Vasistha is estimated around 6th century according to Wikipedia.
But I haven't heard about this text like Bhagavad Gita, Ramayana, etc. So a natural question arises. Is it authentic scripture?
Did there exist oral tradition of Yoga Vasistha in the past and was written down recently like Ramayan? I tried to contact persons who have posted the text on archive.org to research about its origin. I wanted to know from where did they get it from. All the translators are dead except the one for Lagu Yoga Vasistha. I had no luck. Also I'm surprised why such a profound text is just found in archive.org and not in the limelight. Very very few people know about this text. So is it unpopular just by chance or is it a non authentic scripture?