The Doomsday Key: A Sigma Force Novel

Bloodline: A Sigma Force Novel

The Eye of God: A Sigma Force Novel

Sandstorm

The 6th Extinction: A Sigma Force Novel

Map of Bones: A Sigma Force Novel

Crucible: A Thriller

The Cult of Osiris (Wilde/Chase 5)

The Sacred Vault (Wilde/Chase 6)

The Devil Colony: A Sigma Force Novel

The Covenant of Genesis (Wilde/Chase 4)

The Seventh Plague: A Sigma Force Novel

The Hunt For Atlantis (Wilde/Chase 1)

Final Option