They believe secrets give them power. Book Eight of the Dan Kotler archaeological thrillers During World War II, Hitler’s obsession with ancient knowledge and mystical artifacts drives the Nazis to scour the globe. The División Azul —the elite Spanish Blue Division —fights ferociously alongside German forces on the Eastern Front, delivering victory after victory. But unknown to Hitler, an ancient secret order has infiltrated its ranks, quietly working against the Reich. These guardians smuggle the most dangerous and powerful artifacts out of Europe and hide them in a heavily fortified vault deep in the mountains of Arizona’s Sonoran Desert. Now, in the present day, Dr. Dan Kotler—brilliant archaeologist and FBI consultant—teams up once again with his partner, Agent Roland Denzel. Together they race to unravel the riddle of the Spanish Papers , decode long-buried clues, and stop a ruthless rogue organization from seizing the vault’s contents. If they fail, the enemy will succeed where Hitler’s forces could not—unleashing artifacts of unimaginable power that could reshape the modern world and endanger billions of lives. "J. Kevin Tumlinson’s thrillers are a throat-clutching ride. If you love historical mysteries crafted with action and adventure, don’t miss [Tumlinson’s books]!" — James Rollins, #1 New York Times Bestseller of Arkangel "With the pacing of a blockbuster and the depth of literary fiction, Kevin Tumlinson crafts stories that are both intellectually engaging and impossible to put down—prepare to lose sleep." — J.D. Barker, New York Times Bestselling Author "Where [Tumlinson’s work] excels most is its cross-genre appeal. All of these disparate elements shouldn’t work together, but they do, and a big reason is that this novel is just so damn fun." — Jeff Daugherty, BookTrib