Some time ago I found on my grandma’s house an old Italian book on cryptography from 1897. Why a 120 years old book on cryptography was on my grandma house, is a mystery. I’d like to think that some grand-grand-parent was a late 19th century hacker. Anyway. The book title is “Crittografia ossia l’arte di cifrare e decifrare le corrispondenze segrete” of Count Luigi Gioppi of Turkheim. Well, I don’t know if this book is hard to find.