She must face her fears and solve the mystery at a rare Halloween Festival to reclaim her house from a haunting spirit.

It's 2001, and Emily has lost her childhood home to a haunting spirit, and now the government is ready to snatch it up. Emily regrets ever inviting that spirit into her house and wants to make it right (and get her stuff back). Terrified since the ghost possessed her, Emily's life takes an unexpected turn when her name is drawn for a rare Halloween festival. A camp of spirits is the last place she wants to go, but if she doesn't show up, her classmates won't let her hear the end of it. But a comment from a classmate suggests the festival may hold the secret to banishing the spirit.

Digging deeper, Emily learns about a mysterious portal opener who releases spirits on festival grounds every nineteen years. This has happened since the first festival's inexplicable "accident." Joined by her cousins, Emily rides terrifying rides, follows suspicious camp leaders, questions creepy carnies, and pieces together clues about the festival's dark past. All while gathering tickets to win the grand prize and spite a bully.

But when Emily discovers a secret book, she must face her fears before the spirits unleash a dangerous entity. If she can't control her fears, everyone at the festival risks losing their sanity. Can she master her fears, banish the spirits, and reclaim her home?

Full Moon Festival is a thrilling and ghostly paranormal mystery of supportive family, developing courage, hidden secrets, creepy settings, and a dark history to unravel, perfect for fans of Jessica Renwick and her "Lavender Raine" series and Katherine Arden with her "Small Spaces" series.