Girl A by Abigail Dean (HB)

"Lex Gracie doesn't want to think about her family. She doesn't want to think about growing up in her parents' House of Horrors. And she doesn't want to think about her identity as Girl A: the girl who escaped. When her mother dies in prison and leaves Lex and her siblings the family home, she can't run from her past any longer. Together with her sister, Evie, Lex intends to turn the House of Horrors into a force for good. But first she must come to terms with her six siblings - and with the childhood they shared."--Publisher