Robert William Gronewold
| Item | Date | Publisher | Price | Role |
|---|---|---|---|---|
| The Crystal Key: The Wellspring Trilogy Vol. 1 | July 22, 2020 | Chapterhouse Comics | $13.99 | Writer |
| The Crystal Key: The Wellspring Trilogy Vol. 1 | Oct. 25, 2017 | Chapterhouse Comics | $13.99 | Writer |
| The Wellspring Trilogy Vol. 1: The Crystal Key | Oct. 25, 2017 | Chapterhouse Comics | $13.99 | Writer |
| The Wellspring Trilogy Vol. 1: The Crystal Key | Oct. 25, 2017 | Chapterhouse Comics | $13.99 | Writer |
