The secrets of Earth can be as difficult to uncover as the secrets of the stars. Geologists study the processes that continuously shape and reshape Earth's landscape. When they see rocks, soil, and water, they see clues to earth-forming events that happened hundreds, millions, or even billions of years ago. This accessible volume, a valuable addition to any STEM library, focuses on the different kinds of geologists and the painstaking work they do on their journeys of discovery. It also describes the rock cycle, plate tectonics, and other essential earth-science processes that may motivate budding scientists to consider a geology career.