The World According to Rock defines rocks and discloses how they tell us the history of the Earth. Watercolor illustrations, poetry and prose inserts explain the three principal groups of rocks igneous, sedimentary and metamorphic. Properties and processes forming each rock type (e.g. granite, sandstone and marble) are described. From the stone age until today, the importance of rocks in nature, fuel and mineral resources, buildings, tools, pottery, art, jewels, decorations and foods comes alive. Recreation and fun depends upon rocks for many pleasurable experiences.