Sloan Skye is a summer intern at the FBI. She got bumped from the Behavior Analysis Unit to the Paranormal Behavior Analysis Unit, a joke of a new department. They're tracking a vampire serial killer, but Skye doesn't believe in the supernatural. Of course she gets disabused of that notion, but it takes longer than you might hope.
Tagged with FBI
My biggest problem with this book is that the eponymous character isn't actually named Digit; she's called digit, rather than her real name, Farrah. Digit/Farrah is a high school math genius hiding her ability from her seemingly shallow friends, hoping to live a normal life until she meets her destiny at MIT. But destiny can't wait.