The Last Goodnight: A World War II Story of Espionage, Adventure, and Betrayal

The New York Times bestselling author of the acclaimed Dark Invasion, channels Erik Larson and Ben Macintyre in this riveting biography of Betty Pack, the dazzling American debutante who became an Allied spy during WWII and was hailed by OSS chief General “Wild Bill" Donovan as “the greatest unsung heroine of the war.”

Betty Pack was charming, beautiful, and intelligent—and she knew it. As an agent for Britain’s MI-6 and then America’s OSS during World War II, these qualities proved crucial to her success. This is the remarkable story of this “Mata Hari from Minnesota” (Time) and the passions that ruled her tempestuous life—a life filled with dangerous liaisons and death-defying missions vital to the Allied victory.

For decades, much of Betty’s career working for MI-6 and the OSS remained classified. Through access to recently unclassified files, Howard Blum discovers the truth about the attractive blond, codenamed “Cynthia,” who seduced diplomats and military attachés across the globe in exchange for ciphers and secrets; cracked embassy safes to steal codes; and obtained the Polish notebooks that proved key to Alan Turing’s success with Operation Ultra.

Beneath Betty’s cool, professional determination, Blum reveals a troubled woman conflicted by the very traits that made her successful: her lack of deep emotional connections and her readiness to risk everything. The Last Goodnight is a mesmerizing, provocative, and moving portrait of an exceptional heroine whose undaunted courage helped to save the world.

This meticulously researched true story reveals the woman behind the legend:

• An Unsung Heroine of WWII: Follow the journey of Betty Pack, the American debutante turned MI-6 and OSS operative hailed by General "Wild Bill" Donovan as the war’s greatest unsung heroine.
• Codename Cynthia: Discover the truth about the agent codenamed "Cynthia," the beautiful spy who seduced diplomats and military attachés for vital secrets that changed the course of the war.
• Ciphers and Codebreaking: Go inside the high-stakes world of wartime intelligence as Betty cracks embassy safes and obtains the Polish notebooks that were crucial to Alan Turing’s success with Operation Ultra.
• A Troubled Woman, A Perfect Spy: A mesmerizing portrait of a complex woman whose lack of deep emotional connections and readiness to risk everything made her both a flawed human and the perfect operative.

“Two aging former spies—each burdened by dark secrets and hidden motives—steal away for a final rendezvous. Out of that inspired structure unspools a dazzling masterwork of narrative nonfiction that is The Last Goodnight. Howard Blum has vividly captured the extraordinary life of a passionate, complicated, thoroughly modern woman who did nothing less than help win World War II.” - Mitchell Zuckoff, New York Times-bestselling author of Lost in Shangri-La, Frozen in Time, and 13 Hours

“A dazzling masterwork of narrative nonfiction that is The Last Goodnight. Howard Blum has vividly captured the extraordinary life of a passionate, complicated, thoroughly modern woman who did nothing less than help win World War II.” - Mitchell Zuckoff, New York Times-bestselling author of Lost in Shangri-La, Frozen in Time, and 13 Hours

“Fascinating. . . . Reading more like a suspense novel than history, Blum’s account brings an unsung heroine to vivid life. . . . Well documented.” - Kirkus Reviews

“Skillfully researched and entertainingly written. . . . A provocative biography.” - Library Journal

“Scrupulously researched...Blum successfully delineates the social forces in play at the time and conveys the irresistible magnetism that turned a young woman into a world-class spy.” - Publishers Weekly