Berger, who has introduced young readers to a number of Scientists at Work, apparently became interested in occult phenomena after a ""strange and disquieting"" personal experience. The result--one more wide-angle scan covering Duke's Dr. Rhine, performer Uri Geller, the Fox sisters, medium Arthur Ford, Philippine psychic surgeon Tony Agpaoa, Betty and Barney Hill and their UFO encounter. . . . Berger even includes a capsule history of witchcraft, capped by the recent suggestion that the Salem girls were suffering from ergot poisoning. He passes along some parlor games to test your psi power, and despite the prominence here of exposed fakes he remains neutral in theory, concluding that ""whether you believe or not you must agree that it is a fascinating subject."" Many seem to.