A code that substitutes one set of symbols for another. Ciphers are often used to encrypt concepts a person wants to keep secret. Only a person with a key to the cipher can translate it. However, because this type of code is easily cracked, many modifications to a simple cipher have appeared.
Readers, please enjoy this guest blog post by Sandra Kynes, author of several books, including The Herb Gardener's Essential Guide, Plant Magic, and the new Witches' Encyclopedia of Magical Plants, among many others.
Although a few old books...