There are many stories surrounding the festival.

One of them is the tale of the demon Mahishasura and how Goddess Durga decapitated him.[1][2]

The Mahishasura Mardini Stotram is a hymn written in her praise.[3]

Happy Navaratri to all.

[1] Durga Slays the Buffalo Demon at Mamallapuram (https://www.khanacademy.org/humanities/art-asia/south-asia/x...)

[2] Durga (https://en.wikipedia.org/wiki/Durga)

[3] Aigiri Nandini by Uthara Unnikrishnan (Mahishasura Mardini Stotram with Lyrics & Meaning) (https://www.youtube.com/watch?v=Q6W281Bav1k)