Mark Koltko-Rivera

About the Author

Mark Koltko-Rivera is a distinguished author and expert in cryptography and intelligence analysis, with a career spanning academic research, consulting, and popular nonfiction writing. Holding advanced degrees in psychology and holding expertise in symbolic and coded communication, he has dedicated much of his professional life to demystifying the art and science of codes for everyday readers. His approachable yet authoritative voice bridges complex technical concepts with engaging narratives, making esoteric topics accessible to novices and enthusiasts alike. Koltko-Rivera's work reflects his passion for intellectual puzzles and historical intrigue, drawing from diverse influences including military history and cognitive science to illuminate the hidden languages that shape our world.