Tessa Hadley 
The London Train 

From the Sunday Times bestselling author of Free Love and Late in the Day, discover a story of two lives stretched between two cities, two stories bound by the London train.
Paul sets out in search of his eldest daughter Pia, who has gone missing somewhere in London. At first he thinks he wants to rescue her, but as time passes he is drawn deeper into the excitements of the capital, and a life lived in jeopardy, he forgets his own way home.
In the opposite direction, Cora is moving back to Cardiff, to the house she inherited from her parents. She is escaping her marriage and the disappointments of her London life. And then she receives a telephone call to say that her husband has disappeared…
”She has such great psychological insights into human beings, which is rare. She is one of the best fiction writers writing today” Chimamanda Ngozi Adichie