The book: The Cuckoo's Calling by J. K. Rowling under the alias Robert Galbraith (No. 1 in the Cormoran Strike series)
The hook: A supermodel's suicide might not be what it seems when her brother hires an ex-military private investigator to uncover what really happened, digging up family secrets along the way.
Fear factor: Harkens to the good ol' days of detective stories, with likeable, rough-around-the-edges main characters and a plot that keeps you guessing. Big on mystery, light on the scary.