Mysteries of History: Mystery of Area 51
Creatures We Can't Live Without: We Need Bats
True Tales of Terror: Creepy But True: Tales for the Campfire
Ghost Detectors Set 4: Book 20: Doggone!
Creatures of Fantasy: Leprechauns
Creatures of Fantasy: Vampires
Do They Exist?: Do Vampires Exist?
Do They Exist?: Do Aliens Exist?
Uncovering American History: A Primary Source Investigation of the Salem Witch Trials
Do They Exist?: Do Ghosts Exist?
Do They Exist?: Do Witches Exist?
Investigating Atlantis and Other Lost Cities
Investigating Witches and Witchcraft
Do They Exist?: Do Haunted Houses Exist?
Investigating Zombies and the Living Dead