I have found with ALJ's novels, either they really work or they really don't. For me, this trilogy just really did not.
What did not work.
Too much forced angst. This trilogy should have been a duet. There is nothing in the third book that adds to their story.
ALJ writes angst very well. You know what you are getting with her. However, at times, she has a tendency to just keep it going on and on and on. It became exhaustive. Don't get me wrong. I love angst. Just keep some sense of relatability. There was nothing in the third book that added to their story. It should have ended with this book.
For the love of all things 21st century, lose the virgin heroine. A single mother in her 20's not having a date, a relationship and/or a friend with benefits over a prolonged time period (5+ years this time) is an unhealthy and archaic double standard.
Elizabeth was not written as a likable human being. Every facet of Elizabeth (both inner thoughts and actions) were about Elizabeth, not Christian, and certainly not about her daughter. And he was no charmer before he found them again. At least he was honest and put in a good faith effort to change. Elizabeth is portrayed as immature, histrionic a martyr, and a shrew.