Cherie Priest 
Four and Twenty Blackbirds [EPUB ebook] 

Eden Moore was orphaned at birth and brought up by her mother’s beautiful sister Lulu. Even as a child Eden was never alone, three ghostly sisters watched from the shadows, longing to tell her their story. Always kept in the dark about her past, as an adult Eden goes looking for answers, to what really happened to her mother, and to the terrifying secret that lurks at the heart of her family history. Soon she is in a desperate race to uncover the truth before a new and deadly enemy destroys what is left of her family..