Halloween has a complicated relationship with Christianity. The origins of the holiday, like many holidays, has its roots in ancient divination practices and lore while also having a distinctly Christian side. The near-constant metamorphosis of the holiday throughout the centuries in addition to the fact that the holiday deals with death has resulted in a muddled picture of what Halloween celebrates. In Trick or Treat? Lisa Morton traces the practices from the British Isles to the evolution of the holiday in America brought over by immigrants from Ireland to the modern-day commercialization of the event.