Special Reports: Vaccination Debate
Mysteries of History: Mystery of the Roanoke Colonists
Mysteries of History: Mystery of the Mary Celeste
Mysteries of History: Mystery of Area 51
Special Reports: Ebola Outbreak
Climate Change: Examining the Facts
Deadliest Diseases of All Time: Ebola
The Central Intelligence Agency: An Encyclopedia of Covert Ops, Intelligence Gathering, and Spies
9/11 and the War on Terror: A Documentary and Reference Guide
Investigating Atlantis and Other Lost Cities
Investigating Witches and Witchcraft
Investigating Ghosts and the Spirit World
Secret Societies and Clubs in American History
Investigating the Abominable Snowman and Other Legendary Beasts
Disasters and Tragic Events: An Encyclopedia of Catastrophes in American History