The story of one of the second world war's most unsung heroine's is being told a new book. Lindell's list is the story of Mary Lindell throughout the 1940's - an M19 agent who was arrested after countless acts of heroism and thrown into Ravensbrook - a concentration camp for women . There she persisted to save the lives of the women inside.
Its author Peter Hore joined me.
Lindell's List is out now.