Long bright river
(Book)

In a Philadelphia neighborhood rocked by the opioid crisis, Kacey lives on the streets in the vise of addiction. Her sister, Mickey, walks those same blocks on her police beat. They don't speak anymore, but Mickey never stops worrying about her sibling. When Kacey disappears-- at the same time that a mysterious string of murders begins in Mickey's district-- she becomes obsessed with finding the culprit-- and her sister-- before it's too late. -- adapted from jacket