The Death of Mrs Westaway, Ruth Ware

EVERY FAMILY HAS ITS SECRETS. When Harriet Westaway receives an unexpected letter telling her she's inherited a substantial bequest from her Cornish grandmother, it seems like the answer to her prayers. There's just one problem - Hal's grandparents died more than twenty years ago.

Hal desperately needs the cash and makes a choice that will change her life for ever. She knows that her skills as a seaside fortune teller could help her con her way to getting the money. But once Hal embarks on her deception, there is no going back.