Sister Mary Helen von Carol Ann O’Marie umfasst 11 Bücher. Dazu gehören A Novena for Murder, Advent of Dying und The Missing Madonna.
A Novena for Murder
1984
Advent of Dying
1986
The Missing Madonna
1988
Murder in Ordinary Time
1991
Murder Makes a Pilgrimage
1993
Death Goes on Retreat
1995
Death of an Angel
1996
Death Takes Up a Collection
1998
Requiem at the Refuge
2000
The Corporal Works of Murder
2002
Murder at the Monks' Table
2006