"Yes, and my colleague Dr. Spengler and I wrote them," Ray says with an answering grin. "The books on the meter and most of the rest of our equipment, anyway. There's loads of other parapsychology books and studies out there, but this little beauty-" He taps the meter. "That's ours. I could bring you some of the monographs from our library, next time I go home, if you want."