Ghosts of Camp Spirit Moon

The Ghosts of Camp Spirit Moon are the antagonists of the forty-fifth book in the Goosebumps series, Ghost Camp.

History
On a summer night, many years ago, the campers and counselors of Camp Spirit Moon were toasting marshmallows, singing songs and telling ghost stories late into the evening. Not long after everyone headed to their bunks, the entire camp became covered by a strange, smoke-like fog. It enveloped the entire camp for a while until it suddenly vanished. When the campers and counselors recovered, they suddenly realized something was wrong. Their bodies were dead, and all that remained were their ghosts. Not only that, but they were bound to the camp, unable to leave. If they tried, their spirit would be lost in the fog forever.

Years later, Harry Altman and his brother Alex were sent to Camp Spirit Moon for the summer, due in part to it being the only camp available due to them heading out so late in the summer. When they arrive, the campers all seem to act strange. They all like to play jokes on Harry and Alex, each joke being more dangerous and scary. Like one camper named Joey stabbing his neck with a fork, and a girl named Lucy sticking her arm in the campfire. There's also strange puddles of blue ooze all over the camp. Harry at first is skeptical, thinking that all of this is just the campers messing with him, but as things escalate, he learns from Lucy that the campers really are ghosts, and so is she. She tells Harry that the ooze is ectoplasm, which the ghosts have to use to keep up their disguise. She then tells Harry that the only way for a ghost to leave the camp is to possess a living being. She tries to possess Harry, but he manages to escape her in time. Suddenly all of the other ghosts begin to fight over who can possess Harry and Alex. They fight so much that they eventually turn into a swirl of white light and vanish.

Harry and Alex begin to head home, when suddenly Harry notices that Alex is singing badly. He quickly learns that Elvis McGraw, one of the ghosts, possessed Alex.

Personality
The ghosts of Camp Spirit Moon all act mischievous. They enjoy scaring Harry and Alex with frightening acts that become more frightening as the story progresses. Be it pretending to have a fork in their neck, or a tent pole through their foot. The only exceptions appear to be Elvis and Lucy, who act far nicer to Harry and Alex, but it's soon revealed that they are doing so only so that they can possess the two boys.

Appearance
All of the ghosts of Camp Spirit Moon dress alike, in traditional camp uniforms. White t-shirts with white shorts.