From the Sunday Times No. 1 bestselling author of The Girls Who DisappearedOne of them lied. One of them died.When one sister dies, the other must go to desperate lengths to survive …Haunted by her twin sister's death, Abi is making a fresh start in Bath. But when she meets siblings Bea and Ben, quickly moving into the townhouse they share with a a group of lodgers, strange things start to happen.Abi's precious letters go missing, threatening messages are left in her room … Is this the work of the beautiful and capricious Bea? Or is Abi hiding something of her own?Is it a dark secret – one she thought had died with her sister…?