Grigor also worked as film producer and writer. Together with Barbara Grigor, he founded, in 1972, the film company "Viz Ltd" based in Inverkeithing, Scotland. Grigor has also written screenplays for all his films, and a number of exhibition catalogues to accompany his exhibitions. He was co-author of "The Architects' Architect" on C.R. Mackintosh with Richard Murphy and "Being a Scot" with Sir Sean Connery, published in 2008 and which is now published in 5 languages. "Beatus – The Spanish Apocalypse" on the illuminated manuscripts of the Middle Ages on the Book of Revelation, was invited in competition to the 2015 Montréal Festival du Film sur L'Art – the 4th film Grigor has made in partnership with Hamid Shams, the American Director of Photography.