David C. Knight

Best True Ghost Stories of the 20th Century

The Moving Coffins

Meteors and Meteorites

First Book of Sound; a Basic Guide to the Science of Acoustics

The First Book of Sound

Amazing Mrs. Mimms

Christopher Columbus

the first book of deserts

Poltergeists (Weird & Horrible Library)

Those Mysterious UFO's

The Ocean (Let's Find Out S.)

Mars (First Book S.)

Let's Find Out About Insects

Robert Koch