In The Unwritten Rule, Elizabeth Scott took a new take on an old trope: girl likes best friend's boyfriend.
Sarah was a likeable enough character, and also relatable. She's insecure, loyal, and kind (perhaps even too kind). Her voice was clear through the text, and had realistic and well-written emotions.
Her relationship with her best friend, Brianna, wasn't perfect but it was perfectly written and described. The selfish foundations that the friendship was built upon was subtly referred to, leaving us to figure the pairing out.
You'll notice that in my reviews for Elizabeth Scott's books that I use the word 'realistic' a lot. Because that's what really appeals to me in her books: the realism. Her narrators are just normal girls, with crushes and family problems and questionable friends. You can get invested in her books like you can't in paranormals or dystopias because the characters are just like you are or were or knew someone else to be.
I liked the ending. It was happy, but had repercussions from the complication of the novel. I like how not every character gets out unscathed, like it would happen in real life.
I give The Unwritten Rule a 4 out of 5.