Kings of Creation: How a New Breed of Scientists is Revolutionizing Our Understanding of Dinosaurs

I Know What I Saw: Modern-Day Encounters with Monsters of New Urban Legend and Ancient Lore, TarcherPerigee, 2019

Dinotopia

Cryptozoology A to Z: The Encyclopedia of Loch Monsters, Sasquatch, Chupacabras and Other Authentic Mysteries of Nature (with Loren Coleman), Fireside, 1999

Cryptozoology A to Z: The Encyclopedia of Loch Monsters, Sasquatch, Chupacabras and Other Authentic Mysteries of Nature (with Jerry Clark), Fireside, 1999

Chupacabras And Other Mysteries, Greenleaf Publications, 1997

Cadborosaurus: Survivor from the Deep, Horsdal & Schubart, 1995

Bigfoot! The True Story of Apes in America, Paraview/Pocket Books (Simon & Schuster), 2003

Bigfoot Nation: The History of Sasquatch in North America, Adventures Unlimited Press, 2018

Bigfoot Memoirs: My Life with the Sasquatch, Wild Flower Press, 1995