R.L. Stine 
Stuff of Nightmares: Slay Ride #1 [PDF ebook] 

If you dare, get into the sinister spirit of the season and join The Nightmare Keeper for a demented Saint Nick story… one who decks the halls with holiday horror, crafting a very merry macabre Christmas unlike any other! As malls continue to die, a down-and-out former mall Santa named Heinrick Fiddler’s rage turns to madness, and he’s dead-set on making sure department store shopping isn’t the only thing that’s deceased. Treasured Fear Street and Goosebumps author R.L. Stine is joined by Bram Stoker Award-nominated artist Pius Bak (Eat the Rich) for another tale straight from your nightmares!