→ The Dream Detective, Sax Rohmer
→ Photographing the invisible, James Coates
→ Phantasmagoria, Marina Warner
→ The mysterious world of Ted Serios, Jules Eisenbud
→ Researches in the Phenomena of Spiritualism , William Crookes
→ Camera Lucida, Roland Barthes
→ Clairvoyance and Thoughtography, T. Fukurai
→ Chronicles of the photographs of spiritual beings and phenomena invisible to the material eye, Giorgiana Houghton
→ Spirit photography, Pamphlet, A. C. Doyle
→ Jenseits von licht und Schatten, Rolf H. Krauss
→ Beyond the Spectrum, Cyril Permutt
→ Field Guide to spirit photography, Dale Kaczmarek
→ The Guidebook for the Study of psychical research, Robert H. Ashby
→ Encyclopedia for Psychic Science, Nandor Fodor
→ Sight Unseen, Bryan Magee and Martin Milligan
→ Veroniques Schweisstücher, Michel Tournier
→ Lehrbuch der Fotochemie, Alfred Benrath
→ Telepathy and Thought Transference
→Telepathie, Hellsehen und Psychokinese. Aufsätze zur Parapsychologie, Hans Bender
→PSI und Psyche, Eine Festschrift für Hans Bender
→ Human Atmosphere or the Aura Made Visible by the aid of Chemical Screens
→ Odisch magnetische Briefe, C.F. von Reichenbach
→ Bilder aus dem Reich der Toten, Die paranormalen Experimente des Klaus Schreiber