Her encyclopedias on ghosts and spirits, angels, vampires and werewolves, magic and alchemy, witchcraft, demons, dreams, mystical and paranormal experience and saints are considered essential sources for authors, researchers, film and documentary producers, and paranormal investigators. Her work has been translated into 14 languages and has been selected by major book clubs around the world. She appears in television programs, documentaries and docudramas with paranormal themes, and makes numerous media and lecture appearances, including colleges and universities.
Guiley is a frequent guest on Coast to Coast AM with George Noory, the leading nighttime syndicated talk radio show, and has co-authored a book with Noory on spirit communications Talking to the Dead (Tor Books).
In particular, she researches interdimensional entity contact experiences involving entities such as shadow people, aliens, mysterious beings and creatures, angels, fairies, Djinn and demons. She also reasearches documentation of interdimensional portals, using innovative photography and real-time spirit communications devices.
