This is a quick review, one I wanted to write while the book is still fresh in my mind.
A Blue So Dark by Holly Schindler is a very aptly-named book: this is a dark and sad tale. Schizophrenia is never a disease to be romanticized, and the author of this story makes it clear that the heartbreak of mental illness can last DECADES.
Aura is a great character, and she's one of those that I'd love to be able to give her a hug, let her know she doesn't have to be alone, and that it's all going to be okay. Schindler writes in a wonderful manner, she is very tuned-in to both teenagers and divorced families.
I would think carefully about having an actual young adult read this book. It's a "deep in the trenches" type book, and it's a story that deserves to be told, but not all teens can handle something like this. I can see this book being very useful in a college curriculum like Psych 101 or Humanities 101, but not at a high school level. This is my personal opinion though, and since I don't have any actual live teens in my social circle, I could be way off base.
Overall, 3.5 stars and I would most likely read another story from this author.