- Hidden History: Lost Civilizations, Secret Knowledge, and Ancient Mysteries
- Handbook of Paranormal Powers
- Ancient Treasures: The Discovery of Lost Hoards, Sunken Ships, Buried Vaults, and Other Long-Forgotten Artifacts
- Haunted Spaces, Sacred Places: A Field Guide to Stone Circles, Crop Circles, Ancient Tombs, and Supernatural Landscapes
- The Encyclopedia of Paranormal Powers: Discover the Secrets of the Unexplained