Three women whose resolve, intelligence and bravery helped shape history—at a time when females had few rights and were excluded from the priesthood, the military and universities—are studied by Ken Follett. He begins with the story of 12th-century German nun Hildegard von Bingen, one of the inspirations behind the character of Caris in his novel World Without End. French writer and mystic Marguerite Porete challenged the very foundations of church teachings 120 years later. Follett also profiles Joan of Arc, the woman who inspired a fledgling nation in its war against foreign invaders.

• Ken Follett