Their lives are pretty routine: class, mass, confession, some free time, chores, bad food, lights out. Then there are some new patients in the sick ward that changes the girls lives. This book gives you: teenage girl fights, big questions about love and God, the wonderfulness of great friendships, the general horror of being a teenager whose body is changing, and (IMHO) more than a few cases of undiagnosed mental illnesses.
Some reviewers criticize the girls for their "mindless drivel". I think that these girls who: have not much life experience (and what they have is not considered well balanced or "normal"), don't have any real safe relationships with adults where they can ask them personal questions, and have a lot of time to ruminate on things during hours of prayer and church services would talk pretty much exactly that way. Also, they are teenagers. Mostly they won't be discussing Shakespeare.
I thought this book was full of well fleshed out and realistic characters, believable scenarios, in an easy to follow narratives. I give this book a 3.5 stars out of 5. Tip of the hat to T from Traveling with T who a couple of months ago hosted a chat with the author and got this book on my radar.