Persuaded by the word "treating" to dress up as a princess for Halloween, Mercy the pig's trick-or-treat outing has some very unexpected results.

First-grader Posey and her friends are excited about Halloween, but also a little nervous about trick-or-treating and eating Miss Lee's monster stew.

When just before Halloween, Lucely Luna and her friend Syd accidentally awaken evil spirits, who proceed to wreak havoc throughout St. Augustine, they are forced to enlist the help of Babette, Syd's witch grandmother, and her overweight cat, Chunk, to defeat the demons and save the city.

In their magic treehouse, Jack and Annie are again transported to King Arthur's realm, where invisible beings, giant ravens, and mistaken magic spells have a duke's castle in an uproar on Halloween night.

The pressure's really piling up on Greg Heffley. His mom thinks video games are turning his brain to mush, so she wants her son to put down the controller and explore his creative side. As if that s not scary enough, Halloween's just around the corner and the frights are coming at Greg from every angle. When Greg discovers a bag of gummy worms, it sparks an idea. Can he get his mom off his back by making a movie . . . and will he become rich and famous...