Practical explanation of plate tectonics, continental drift, and the sometimes disastrous consequences. Written by a respected geologist and science writer who has traveled the world, I appreciate the inclusion of his anecdotes and commentary along with the factual information. Thorough but straightforward enough to be understood by a non-scientist. Still it's fairly dense for children's nonfiction, so I recommend this book for middle school, or even high school, students. It's compelling enough to be read independently, especially by children/teens who gravitate towards true stories. Photographs, maps, and diagrams all help to further elucidate the well-written text.