Amazon.com says about Lisa Morton’s “Trick or Treat: A History of Halloween:” “Every year, children and adults alike take to the streets dressed as witches, demons, animals, celebrities, and more. They carve pumpkins and play pranks, and the braver ones watch scary movies and go on ghost tours. There are parades, fireworks displays, cornfield mazes, and haunted houses—and, most important, copious amounts of bite-sized candy.