You survived 25 Days. Now brace yourself for the nights. Last December, readers followed an innocent family as they became pawns in a horrifying game of Secret Santa in Per Jacobsen's international bestseller 25 Days. This time around, the story dives deep into the mind of the villain; the man in the ski mask. And what's in there will not only offer a new perspective on the events of the first book-it may just change your view of him. Once again, the rules of the game are simple: 25 nights. 25 chapters. One for each day in December as you count down to Christmas.