All That Was Lost — Alison May

In 1967 Patience Bickersleigh is a teenager who discovers a talent for telling people what they want to hear. Fifty years later she is Patrice Leigh, a nationally celebrated medium. But cracks are forming in the carefully constructed barriers that keep her real history at bay.
Leo is the journalist hired to write Patrice's biography. Struggling to reconcile the demands of his family, his grief for his lost son, and his need to understand his own background, Leo becomes more and more frustrated at Patrice's refusal to open up.
Because behind closed doors, Patrice is hiding more than one secret. And it seems that now, her past is finally catching up with her.