The How and Why Book of Rocks and Minerals

"In the age of rockets and missles, the study of rocks and minerals is no less important - and in this colorful 'How and Why' science book, we see why it is so important. We learn that our modern age of rockets would not be possible without minerals from the earth's crust. We learn the answer to dozens of important questions about the earth's surface and the changes that take place in it". - Dr. Paul E. Blackwood