Old Guns Book 4: Dead Guns

The Last Hunter Book 17: Preemptive Action

Accidental Astronaut Book 6

Flying Gas Can Book 3: The Starless Forge

Backyard Starship Book 35: The Queen of Darkness

Android Wars Book 6: Annihilation

Gold Medal Marine Book 5: Phantom Flux

Portal Raiders Book 2: Gate Crashers

The Last Reaper Book 16: Return of the Reaper

Backyard Starship: Origins Collection

Honey, I Found a Starship Book 5: Honey, I Freed a Vatling

Backyard Starship Book 34: An Ancient Light