The haunted burial ground.

The Unicorn Club is throwing the best Halloween party Sweet Valley Middle School has ever seen! Lila Fowler's dad has lent the girls a run-down shack in the woods, a perfectly spooky place for the party. But as the Unicorns are fixing up the shack, strange and scary things happen. Rumors are flying that the shack was built over an ancient Native American burial ground. could the shack really be haunted, or are the Unicorns the victims of a terrif...