At the beginning of My Lover’s Lover, I thought O’Farrell was writing an updated version of Rebecca, and indeed she references the movie early in the book. However, if she had that in mind at all, she moves away from it.
Lily meets Marcus at a party and feels an attraction to him. When he mentions that he needs a flat mate, she asks if she can take the room. However, when she goes to see it, she is surprised to find it still full of another woman’s possessions. She takes the room in the renovated Victorian warehouse with Marcus and his friend Aidan, but she becomes obsessed with Marcus’s old lover, Sinead. Although he refuses to talk about Sinead, Lily understands him to have told her Sinead is dead. Once Lily and Marcus become lovers, Sinead begins haunting her, appearing in the flat.
But Sinead isn’t dead. Once Lily finds that out, she goes to see her to ask her what happened. Then the story is told of the beginning and the end of their relationship.
This is another beautifully written, insightful tale by O’Farrell. Sadly, I think I have now read all her books. I’m going to have to wait for the next one to come out.
whatmeread 
I thoroughly enjoy Maggie O’Farrell’s books, and will look for this one. Sounds intriguing, and so much O’Farrell. For one of my book clubs we will read Hamnet next.
That’s a good one, too. In fact, all of hers are good.
OOps.. you included a spoiler here… You really should warn people about that!
What was it?
You gave away the status of the previous girlfriend.
Yes, but I thought that happened early enough in the book.
No… If I recall correctly, she doesn’t figure it out until at least two thirds in… That’s the whole point…
Well, I didn’t think it was the whole point, or I wouldn’t have said anything.
Her memoir was so hyped that I just think of her as a memoirist, just now finding out she’s written so many novels… this one is intriguing!
I haven’t heard of her memoir.