Looking for a good mystery? Try The Butterfly Clues by Kate Ellison.
Penelope (Lo) Marin loves beautiful things, and hunting for treasures. Her room is full of them, arranged just-so. Since her brother died a year ago, her collecting has become a compulsion, much like her need to tap her leg a certain number of times before entering a room. Scouting the local flea mart, she finds a lovely butterfly figurine, which she recognizes as belonging to a girl recently murdered. She becomes obsessed with solving Sapphire's death. Sapphire danced in a strip club in a rough part of Baltimore known as Neverland. Lo meets a quirky, cute street artist named Flynt and continues to dig into the murder, despite being warned off. Her home life is a mess, with her mother drugged out on tranquilizers most of the time, and her father constantly working. They all have their own ways of dealing with her brother's death--or not dealing with it. Lo struggles to appear normal, as pressures at home, at school and in her search for Sapphire's killer mount. Her compulsions consume more of her time. The puzzle fragments begin to form a picture, but something's still missing. When Lo finds it, she'll be done. Or dead.