In writing, they always say "show, don't tell." This book is all tell, no show. Beyond their names and ages, the characters aren't described much, making it hard to differentiate them at first.
I found the writing to be very flat and simple. I'm tempted to count the adjectives, as I feel it will be a very small number.
For instance, she TELLS us it's a cold night, but nobody shivers or pulls their coats closer. We're told the girls are scared, but we don't "see" them acting scared. The author doesn't describe body language, or facial expressions, or sounds, or textures, or smells or feelings. It feels distant.
In the last section, where the legal procedings are described, this flat accounting of facts works, but the rest of the book ... doesn't.