"The Geology Book" is a nonfiction book about geology and how the rock formations we see around us came to be. The author assumed that he had a Christian audience and occasionally spoke in terms of "God created" and the like. He clearly explained each topic and defined the few scientific terms in the text (though there's also a glossary in the back). There were full color pictures and illustrations. In the back, there's a 12 by 24 inch pull-out full-color poster titled "When the Earth Moves" with pictures from the book. I think 11-year-olds on up can easily understand the information in this book. The introduction claims that the book will compare gradualism to catastrophic explanations for geological formations, but the author does so only in a very subtle way. I liked how it was handled, but I expected a more obvious comparison after reading the introduction. Overall, I'd recommend this book to children who are interested in learning more about geology from a scientist with a Christian perspective. Chapter 1 explained the layers of Earth (crust, mantle, etc.). Chapter 2 described the rock types (igneous, sedimentary, metamorphic). Chapter 3 talked about the earth surface (plains, plateaus, mountains, erosional features like canyons). Chapter 4 described geological processes and rates (erosion, deposition, fossilization, volcanism, deformation of rocks, formation of metamorphic rocks, radioisotope decay and dating, etc.). Chapter 5 discussed several ways to date the age of the earth (erosion, chemicals in the ocean, sediments in ocean, atmosphere, magnetic field). Chapter 6 covered the great geologic events of the past (Creation, Flood, Ice Age). Chapter 7 answered ten common questions (how was the Grand Canyon formed?, what causes the geysers in Yellowstone Park?, etc.). Chapter 8 discussed what the Bible says about what the future Earth will be like.