From Gary Gygax:
- Gary Gygax's Extraordinary Book of Names
- Gary Gygax's Insidiae
- Gary Gygax's Living Fantasy
- Gary Gygax's World Builder

From Kobold Press:
- ePublisher Guide
- Kobold Guide To Board Game Design
- Kobold Guide to Game Design 1 Adventures
- Kobold Guide to Game Design 2 Pitch, Playtest and Publish
- Kobold Guide to Game Design 3 Tools and Techniques
- The Pen is Mightier than the Sword

And more:
- City Works
- GameMastery Guide (2nd printing)
- Kobold Guide To Worldbuilding
- Never Unprepared - The Complete Game Master's Guide To Session Prep
- Stronghold Builder's Guidebook
- Tome of Adventure Design
- Ultimate Campaign
- Ultimate Toolbox
- World Builder's Guidebook