Many women can certainly identify with Ester's emotions at some level. Her mixed feelings and divided attitude about a useless relationship with a self serving man. Most women have been in love and, even if it was not unanswered love, at least they felt uncertainty about the other person's feelings.
It's intellectual and philosophical with many references to great classic literature like Chekhov and Dostoevsky. But, first of all, it's psychological. Alternations between clarity and despair and self deception and hope. The novel earned the August prize in 2013, and is a rare piece of literature that really shows that the heart sees what it wants to see, and the mind has to adjust to that. The choices of the blind heart matches one's inner longings.