This is a very well done book on earthquakes aimed at the early elementary school crowd. It's very thorough but enjoyable. The language is not dumbed down like many children's books, but difficult terms and concepts are explained in a concrete way, such as the comparison of the earth and its crust to an apple and its peel. Several examples of real earthquakes are presented, describing the level of damage and destruction along with the Richter scale measurement. As would be expected, the main section of the text ends with safety tips.
The illustrations are gorgeous and vibrant. They take the book from good to outstanding. They really give you a feel for what the text is describing.
Finally, at the very back of the book, there is a page with additional earthquake facts, just neat little "did you know" sort of things that weren't part of the basic earthquake information. There's also a page listing the top ten most destructive earthquakes in terms of the death toll.
I have another book on earthquakes aimed at this age range, and it's very lackluster. This one, however, is outstanding, with very little room for improvement.