“Unsolved!: The History and Mystery of the World’s Greatest Ciphers” by Craig P. Bauer is a textbook published by Princeton University Press in 2017. Focusing on the subject areas of Computer Science, Cryptography, and Communication Studies, the book delves into the intriguing history and mystery of various ciphers from ancient Egypt to online secret societies. This hardcover book features 624 pages and is written in English, making it a valuable resource for those interested in the world of cryptography and its secrets.”