Innocent Blood: The Order of the Sanguines Series

The Blood Gospel: The Order of the Sanguines Series

Blood Infernal: The Order of the Sanguines Series

The Last Odyssey: A Thriller

Arkangel: A Sigma Force Novel

The 6th Extinction: A Sigma Force Novel

Crucible: A Thriller

The Doomsday Key: A Sigma Force Novel

The Bone Labyrinth: A Sigma Force Novel

The Eye of God: A Sigma Force Novel

Bloodline: A Sigma Force Novel

Map of Bones: A Sigma Force Novel

The Devil Colony: A Sigma Force Novel

The Judas Strain: A Sigma Force Novel