GET INSIDE GRIMM.   NBC’s hit television series Grimm pits modern detective Nick Burkhardt of the Portland Police against a cast of terrifying villains—lifted directly from the pages of classic fairytales. In the world of the show, the classic stories are actually a document of real events, and Nick himself is descended from a long line of guardians, or Grimms, charged with defending humanity from the mythological creatures of the world.   From The Big Bad Wolf to Sleeping Beauty, The Mythology of Grimm explores the history and folkloric traditions that come into play during Nick’s incredible battles and investigations—tapping into elements of mythology that have captured our imaginations for centuries.