Mysteries of History: Mystery of Area 51
True Tales of Terror: Creepy But True: Tales for the Campfire
True Tales of Terror: And the Cat Came Back: True Tales of Animal Spirit Hauntings
Ghost Detectors Set 4: Book 18: Spaced Out!
Freaky True Science: Freaky Weather Stories
Ghost Detectors Set 4: Book 17: Grow a Ghost!
Do They Exist?: Do Aliens Exist?
Do They Exist?: Do Vampires Exist?
Investigating Atlantis and Other Lost Cities
Investigating Ghosts and the Spirit World
Do They Exist?: Do Ghosts Exist?
Do They Exist?: Do Haunted Houses Exist?
Uncovering American History: A Primary Source Investigation of the Salem Witch Trials
Searching for the Loch Ness Monster
Investigating Witches and Witchcraft