Your body's defenses

By David C. Knight

Describes the body's various natural defenses against diseases and gives hints on how one can reinforce these defenses with rest, proper nutrition, etc.

Best true ghost stories of the 20th century

By David C. Knight

Stories of unexplained events that baffled psychic researchers, including the Tulip Staircase ghost, the ghosts of Versailles, the phantom of Howley Hall links, and others.

Dinosaurs that swam and flew

By David C. Knight

Text and pictures describe lesser-known pre-historic reptiles that swam and flew.

The haunted souvenir warehouse

By David C. Knight

Describes and explains supernatural occurrences in eleven locations around the world.

Those mysterious UFO's

By David C. Knight, Anonymous

Discusses sightings of flying saucers and other unidentified flying objects and possible explanations of these phenomena.

Poltergeists: hauntings and the haunted

By David C. Knight

Accounts of eleven famous poltergeists of the last few centuries, theories about them, studies of where, who, and why they haunt, and suggestions on what to do if you encounter one.

Let's find out about earth

By David C. Knight

Defines the important features of the earth both as an individual planet and as a member of our solar system.

Let s Find Out About Weather

By D. C. Knight

Let's find out about the ocean

By David C. Knight

A brief description of the size and shape of the ocean, the various fish and plants that inhabit it, and its importance to man.

Let's find out about sound

By David C. Knight

Simple text and illustrations explore the properties of sound.