Each of these easy-to-read and informative books, written by well-known nonfiction authors Louise and Richard Spilsbury and Chris Oxlade, explains what each type of rock is, where it is found, how the rock is formed, what we use the rocks for, and how we can protect them. The format makes this a great set for classrooms studying rock formations. Each book also includes "Rock Roles," which explains the work that is involved in the study of rocks, "Science Tips," "Number Crunching," where amazing numbers and percentages about rocks are revealed, and "Biography," which explores people who have made important discoveries. These different sections are more like side notes in the margin that are highlighted with colorful borders. Tricia Grady, Franklin (Indiana) Community Middle School Library Media Connection November/December 2011.