- Secret Heroes: Everyday Americans Who Shaped Our World
- Villains, Scoundrels, and Rogues: Incredible True Tales of Mischief and Mayhem
- Excursion to Enchantment: A Journey to the World's Most Beautiful Places
- Messengers to the Brain (Books for world explorers)
- Our Awesome Earth: Its Mysteries and Its Splendors (Special Publications Series 20: No. 4)