1917: Europe is on the cusp of seismic change. In the Alpine village of St Niklaus, the war seems far away. Yet everyone is fighting a personal battle.

In the shadow of a mountain, 14-year-old Seraphine helps Mama manage the farm while Papa defends Swiss borders. She dreams of seeing the world. After the war.

A young medical graduate arrives in the valley. Under the patronage of a local doctor, he puts his faith in a revolutionary idea. He is determined to influence the world. After the war.

Dr Bayard cannot wait until after the war. In the most beautiful place on earth, people still suffer from a centuries-old affliction. Armed with a theory, two sacks of salt and a mule, Bayard climbs a mountain, intent on treating one tiny village.

The paths of two unlikely young people cross in turbulent times - against the backdrop of one country doctor's fight against folklore, prejudice and false pride.

Salt of the Earth is a journey of bravery and broken hearts following their call. A quest for love and healing in the face of precarious destiny.

"Meticulously researched and beautifully written, this fascinating novel tells the little-known story of a life-changing medical breakthrough in the tumultuous times of WWI." - Clare Flynn, author of The Pearl of Penang

"A powerful and heart-breaking tale of a cure for one of history's most devastating ailments." Liza Perrat, author of The Bone Angel trilogy