Amongst Parrott's writings are a book on the Davies sisters of Gregynog entitled "The Spiritual Pilgrims", and a book on Elgar for the "Master Musicians" Series.
Amongst Parrott's writings is "The Spiritual Pilgrims", a book on Gweindoline and Margaret Davies, who founded the Gregynog Festival. He also wrote a book on Elgar for the "Master Musicians" Series.