The encrypted diary of prisoner of war Donald Hill is unique. Hill not only encrypted his entries but also disguised them as a collection of mathematical tables. In a self-experiment, I tried to encrypt and hide a text like he did.
In a little known book I found a story about encrypted notes from 1905, including a diary. Can my readers support me with finding out more about these documents and decrypting two paragraphs?
The Blitz Ciphers are an encrypted book allegedly found in London just after World War II. Only eight page scans have been published. Some of my readers consider the Blitz Ciphers a fake.
On a Russian website a handwritten notebook from the Soviet era is described. Its content is encrypted. Can a reader solve this unusual cryptogram?
An unknown Freemason author once published a book, the content of which is given as a picture word puzzle (rebus). The solution is not known to me.
My list of encrypted books keeps growing. The latest entry (book number 80) is one of the most peculiar.