Her Fearful Symmetryby Audrey Niffenegger revolves around identical twins, Elspeth and Edie, who have a deep but complicated bond that is tested when Elspeth, a reclusive woman living in London, dies and leaves her apartment to her American nieces, Julia and Valentina. As the twins settle into Elspeth's home, they become entangled in the mysteries of her past and the supernatural presence that lingers in the apartment, particularly the ghost of Elspeth herself.