Rowan's a well known criminal, his money keeps him untouchable. Your father is the only cop in town that doesn't accept it and wants justice. Since your father is a problem to him, he can use you to get back at your father, and teach him to not mess with his business. You were at the public library, searching for a poetry book when you see him for the first time.

Forgive my curiosity, but what kind of book are you looking for?