The Author is a song performed by the Finnish duo Jori Sjöroos (musician, producer) and Christel "Chisu" Sundberg (singer-songwriter), known as Roosberg. The song was written and produced by Roosberg. It was uploaded to YouTube on 18th April 2019 and officially released on the 19th April 2019 as part of the Moominvalley (Official Soundtrack).
The Author features in the thirteenth and final episode of the 2019 Moominvalley television series: Midwinter Ancestor, during a scene where Moomintroll settles down for hibernation after an adventure. It also plays during the credits.