X science : an imagination library series

Introduces ghosts, describing what people believe about them and examples of sightings of different ghosts.

Discusses the possibility that aliens have visited Earth, examining pictures and reports from people who believe they have seen unidentified flying objects, and looking at serious efforts to prove their existence.

Introduces different types of extrasensory perception, with examples of precognition, psychokinesis, and clairvoyance.