- Trees, haiku from roots to leaves, Sally M. Walker ; illustrated by Angela Mckay
- Secrets of a Civil War submarine, solving the mysteries of the H.L. Hunley, Sally M. Walker
- Underground fire, hope, sacrifice, and courage in the Cherry Mine disaster, Sally M. Walker
- Champion, the comeback tale of the American Chestnut tree, Sally M. Walker
- Figuring out fossils, Sally M. Walker
- Written in bone, buried lives of Jamestown and colonial Maryland, Sally M. Walker
- Rhinos, by Sally M. Walker ; photographs by Gerry Ellis
- Out of this world, star-studded haiku, Sally M. Walker ; illustrated by Matthew Trueman
- Ghost walls, the story of a 17th-century colonial homestead, Sally M. Walker
- Earth verse, haiku from the ground up, Sally M. Walker ; illustrated by William Grill
- Their skeletons speak, Kennewick man and the Paleoamerican world, Sally M. Walker, Douglas W. Owsley
- Freedom song, the story of Henry "Box" Brown, by Sally M. Walker ; iIllustrated by Sean Qualls
- Reefs, by Sally M. Walker
- Sinking the Sultana, a civil war story of imprisonment, greed, and a doomed journey home, Sally M. Walker
- Marveling at minerals, Sally M. Walker
- Mosquitoes, by Sally M. Walker
- Winnie, the true story of the bear who inspired Winnie-the-Pooh, Sally M. Walker ; illustrated by Jonathan D. Voss
- Researching rocks, Sally M. Walker
- Soil, by Sally M. Walker
- Caves, by Sally M. Walker
- Deadly aim, the Civil War story of Michigan's Anishinaabe sharpshooters, Sally M. Walker
- Minerals, by Sally M. Walker
- Fossils, by Sally M. Walker
- Rocks, by Sally M. Walker
- Underground fire, hope, sacrifice, and courage in the Cherry Mine disaster, Sally M. Walker