Innocent Blood: The Order of the Sanguines Series
Blood Infernal: The Order of the Sanguines Series
The Bone Labyrinth: A Sigma Force Novel (Sigma Force Novels)
Bloodline: A Sigma Force Novel
The Devil Colony: A Sigma Force Novel (Sigma Force Novels)
Amazonia
The Sixth Extinction (Sigma Force)
Black Order: A Sigma Force Novel
The Seventh Plague: A Sigma Force Novel (Sigma Force Novels)
War Hawk: A Tucker Wayne Novel