“Barbara Tuchman meets John Le Carré in Treacherous Passage, a gripping story of espionage and intrigue that reminds us that World War I truly was a global war fought on many fronts.”

—Christopher Capozzola, author of Uncle Sam Wants You: World War I and the Making of the Modern American Citizen

“The Zimmermann Telegram is infamous. But the story of Germany’s World War I plot to launch sea raiders against U.S. commercial shipping from Mazatlán remains an episode almost as obscure today as it was in 1918. This book is a revelation.”

—Alan Axelrod, author of Miracle at Belleau Wood and The Battle of Verdun