Pensa Num Número

Arriving in the mail one day is a taunting letter that ends with a simple declaration "See how well I know your secrets-just think of a number." Eerily, those who comply find that the letter writer has predicted their random choice exactly. For Dave Gurney, just retired as the NYPD's top homicide investigator and forging a new life with his wife, Madeleine, in upstate New York, the letters are oddities that begin as a diverting puzzle but quickly ignite a massive serial-murder investigation. Bro