My Lover's Lover - Maggie O'Farrell
I've loved everything I've read by Maggie O'Farrell, until this. I didn't dislike it, I just found it somewhat dull compared to other books of hers I've read. I just couldn't connect with Lily or her plight. The secondary story involving Sinead was far more interesting.

Ms. O'Farrell's books generally do not offer a definite resolution, but I would have appreciated something a little more unambiguous in this case.