The Au Pair is her first novel.
At CrimeReads Rous tagged eight novels that fuel our fascination with twins, including:
The Thirteenth Tale, Diane SetterfieldRead about the other entries on the list.
Adeline and Emmeline are out-of-control twins growing up in a wealthy but unstable family. The bond between them is powerful and, at times, destructive. The book opens with a reclusive author, approaching the end of her life, deciding to tell the truth—or at least, part of the truth—about her disturbing childhood. She convinces her reluctant biographer to listen to her tale, and her memories take her back to Angelfield, her family’s estate, long since burnt to the ground under mysterious circumstances. The identity of Adeline and Emmeline, and the exact relationship between them, is more complicated than the biographer at first understands, and gradually the elderly author reveals the dark secrets that have haunted her all her life.
--Marshal Zeringue