• The Hidden Room
• Summer Island
• Yes, I Know the Monkey Man
• The Case of the Fire Alarm
• The Ghost in the Attic
• The Ghost at the Fire Station
• The Haunted Library
• The Case of the Mixed-Up Mutts
• The Hide-and-Seek Ghost
• Case of the School Ghost
• Sliding into Home
• The Case of the Lost Boy
• The Case of the Missing Family
• Do You Know the Monkey Man?
• The Underground Ghosts #10--A Super Special
• The Ghost in the Tree House
• The Ghost Backstage
• Do You Know the Monkey Man?: A Novel
• The Ghosts at the Movie Theater
• Truth about Truman School