Wheatley Dennis Wheatley 
Second Seal [EPUB ebook] 

Spring 1914. At a masked ball, the Duke de Richleau has an intriguing meeting with a beautiful woman — an incident that was to lead to a series of desperate adventures with a Serbian; a secret; a terrorist society; then as a British secret agent at the Austrian Supreme Headquarters. The capers culminate in the Battle of the Marne the operation that shattered Germany’s chance of victory. Through the violence, intrigue and hair’s-breadth escapes, there runs alongside the story of a great love.