THERE ARE many indications that the time has come to provide a convenient one-volume summary of present knowledge about parapsychology. Most urgent is the need among busy professional people for a clear, concise statement of the known facts of this new field of science, just how the researches are carried on and what general advance has been made in relating the new findings to older branches of knowledge. Outstanding among the audience we have had in mind are the various professional groups connected with medicine and the psychological and social sciences and practices. This book was undertaken as a result.
There are other professional groups, too, for whom the volume was intended as a handbook of essential information on the subject: The teacher, for example, or minister or field worker in anthropology should, we believe, find it as well suited to his purpose as the psychiatrist or dermatologist or clinical psychologist. In a word, the competent, mature inquirer, whatever his professional field, should consider that the book was written for him.
Finally, these pages have been written, too, with the coming need of a college textbook in mind. Two university requests for such a text have recently been received, and with the present prospects of the growth of parapsychology, others are anticipated.
More popularly written introductory books on parapsychology have been published in recent years. The titles of most of them may be found in the literature cited in the book. Younger students and nonprofessional readers making their approach to parapsychology may find it advantageous to read one or more of these other works by way of introduction.
This book is, of course, not meant for our long-experienced fellow workers in parapsychology, nor even for the well-read highly informed student of the field who knows most of its scientific literature at firsthand. Likewise, it should not be considered as intended to answer and satisfy completely all the questions the