Vanish:

STARE DEATH IN THE FACE 'If you’re home alone, do not risk even the first sentence. Once you’ve started reading this book, putting it down is not an option’ Mo Hayder Forensic Pathologist Maura Isles unzips a body bag and gets the fright of her life. The corpse opens its eyes. The woman is rushed to hospital, where she murders a guard and siezes hostages, including a heavily pregnant Detective Jane Rizzoli. No one knows who this woman is, or what she wants. Only Jane, trapped with the madwoman, can solve the mystery. If she survives the night . . .