1. "Redstone Challenge Try"
- Triumph Books, Master Builder Power Up! Level 2: Minecraft®™ Redstone for Intermediate Players
3. "The Challenge of Whole Birds"
- Harold McGee, On Food and Cooking: The Science and Lore of the Kitchen
9. "during tough times, Leaders stretch to the challenge, while followers shrink from the challenge."
- Tim Stevens, Fairness Is Overrated: And 51 Other Leadership Principles to Revolutionize Your Workplace
10. "The challenge and the dignity make it interesting enough. Besides,"
- Anne Lamott, Bird by Bird: Some Instructions on Writing and Life