Helter Skelter by Vincent Bugliosi & Curt Gentry - the scariest book I've ever read. Most likely because it is true; it discusses what really went on during the Manson Murders. If you have the guts, read it.
Bring Up the Bodies (Wolf Hall, Book by Hilary Mantel, The sequel to Hilary Mantel's 2009 Man Booker Prize winner and New York Times bestseller, Bring Up the Bodies delves into the heart of Tudor history with the downfall of Anne Boleyn.
After witnessing something shocking, Rachel offers what she knows to the police, and becomes inextricably entwined in what happens next, as well as in the lives of everyone involved. Has she done more harm than good?