The Devil Rides Out

Strange Conflict

Gateway to Hell

The Golden Spaniard

The Black Magic Series

Three Inquisitive People

The Second Seal

Codeword Golden Fleece

To the Devil, a Daughter

The Haunting of Toby Jugg

The Black Baroness

The Eunuch of Stamboul

The Gregory Sallust Series Starter

The Black Magic Series Starter

The Island Where Time Stands Still

The Man who Killed the King

Contraband

The Roger Brook Series Starter

The Sultan's Daughter

The Rape of Venice