The Doomsday Key: A Sigma Force Novel

The Devil Colony: A Sigma Force Novel

The 6th Extinction: A Sigma Force Novel

Sandstorm

The Seventh Plague: A Sigma Force Novel

The Eye of God: A Sigma Force Novel

Map of Bones: A Sigma Force Novel

Bloodline: A Sigma Force Novel

The Cult of Osiris (Wilde/Chase 5)

The Sacred Vault (Wilde/Chase 6)

Typhoon Fury

Blue Gold: A Novel from the NUMA Files

Final Option

Fast and Loose