This is the winner of the composition- competition to mark the bicentenary of "Silent Night" in 2018.
The first 3 pieces are published now by Butz-Verlag No BU 2936. The book includes this Sonata, a Christmas-Triptychon (L. Mengoni) and 6 Variations on Stille Nacht (A. Willscher)
I uploaded the Willscher-piece here: http://www.contrebombarde.com/concerthall/music/36250
Sonate über "Stille Nacht, heilige Nacht" 00:03 Intrada 02:23 Cantilena 05:12 Fuga 07:29 Finale
Complete time 11'30"