Rocks' JourneyBy: Sally M. Walker Illustrator: Kim Smith Series: Nature in Action Rolling boulders here and there . . . In the launch of her first board book series, an award winning nonfiction author brings the youngest explorers close to natures wonders in action. Mighty mountains reach up high, until craggy cliffs tumble and boulders settle everywhere. But how do big, jagged rocks turn into the soft sand we love at the beach? Step by step, Sally M. Walkers