Not enough mystery in your life? Try these!
The Red Thread: a novel in three incarnations by Roderick Townley.
Bothered by insomnia, nightmares, and claustrophobia, sixteen-year-old Dana sees a therapist who hypnotizes her into remembering past lives, involving her in an age-old mystery and causing her to question what kind of person she is.
The Adoration of Jenna Fox by Mary E. Pearson.
In the not-too-distant future, when biotechnological advances have made synthetic bodies and brains possible but illegal, a seventeen-year-old girl, recovering from a serious accident and suffering from memory lapses, learns a startling secret about her existence.
The Black Mirror by Nancy Werlin.
Convinced her brother's death was murder rather than suicide, sixteen-year-old Frances begins her own investigation into suspicious student activities at her boarding school.
Candy by Kevin Brooks.
When Joe meets Candy, it seems like a regular boy-meets-girl scenario. But then Joe is drawn into Candy's world --- a world of drugs, violence, and desperation. As the dark truth about Candy's life emerges, Joe finds himself facing real danger at every twist and turn.
The Compound by S.A. Bodeen.
After his parents, two sisters, and he have spent six years in a vast underground compound built by his wealthy father to protect them from a nuclear holocaust, fifteen-year-old Eli, whose twin brother and grandmother were left behind, discovers that his father has perpetrated a monstrous hoax on them all.