In reading order
The Snowman of Zanzibar
Gordon Wallis
The Teeth of Giants
Gordon Wallis
The Star of the Desert
Gordon Wallis
A Heart of Darkness
Gordon Wallis
The Butcher of Tangier
Gordon Wallis
An Act of War
Gordon Wallis
The Shadow Man
Gordon Wallis
The Manticore of Manhattan
Gordon Wallis
The Phantom of the Congo
Gordon Wallis