Hollow Earth / Matt and Emily Calder
Titles (4)
| # | Title | Author(s) | Year | Type |
|---|---|---|---|---|
| 1 | Hollow Earth | John Barrowman & Carole E. Barrowman | 2012 | |
| 2 | Bone Quill | John Barrowman & Carole E. Barrowman | 2013 | |
| 3 | The Book of Beasts | John Barrowman & Carole E. Barrowman | 2014 | |
| The Hollow Earth Trilogy | John Barrowman & Carole E. Barrowman | 2014 | Omnibus |