This is the last book on my mini-project to read the "Best Novel" Edgar Nominees for last year. Like the others, it's impressively good. There's a sequel, apparently, featuring the major characters here. I've put it on my get-at-library list.
Those main characters (who take turns narrating chapters) are (1) Cyrus Haven, a shrink who consults for the Nottingham police; and (2) Evie Cormac, an institutionalized child who was found hiding in a secret room where a grisly murder had taken place. Evie (aka "Angel Face", the moniker the tabloids put on her) has petitioned to be released from custody, and Cyrus is asked to evaluate her psychological status.
Evie's rebellious, foulmouthed, borderline wacko, and has an uncanny knack of detecting whether people are lying or telling the truth. Cyrus is both intimidated and intrigued. Ah, she's the "Bad Girl".
But he's also called by the cops to help out in a murder case: sweet Jodie Sheehan, on the brink of figure skating stardom has been found dead in a remote Nottingham wood. (I don't remember if it was, literally, Sherwood Forest.) Ah, that would make her the "Good Girl" of the title.
Except, maybe not. The story has a lot of twists and turns, and (as it happens) Cyrus has a lot of unpleasant back story too.