This is probably a true unknown book by everybody's standards I've bought and read it only once. Telepathy is a phenomenon of which humanity has had examples since the always. It can be spontaneous, or provoked, that means experimental. Parapsychology, interested in apparent rebellious phenomena, gives great importance to the study of the telepathic phenomena. This book studies the telepathy in a precise, clear, organic, complete way and, trying to give one explanation on the base of the modern theories.

The volume is made up of two parts. The first, dedicated to the phenomenon, comprises 14 subchapters; the second one, titled "Hypothesis on the nature of the telepathy", represents something new on the argument: a treaty on the theoretical bases on which lay the telepathic facts. Finally, for those who wanted to attempt in the telepathic experimentation, there follows a chapter containing the necessary instructions and the opportune suggestions in order to discover one's own PSI faculties, and eventually to increase them rationally. This edition, modernized and extended, is enriched with a further chapter dedicated to Yoga and telepathy.