A book cipher is a method of encoding and decoding a message where the sender and receiver both use the same text. The sender$\text{'}$s message is encoded by replacing each alphanumerical character in the message to be sent with the location of that character in the text using an $"$s$.$w$.$c$"$ format representing the number of the sentence in the text$($s$),$ the number of the word in that sentence $($w$),$ and the number of the character in that word $($c$),$ all indexed starting with $1.$ The receiver decodes the encoded message by locating the characters in the text specified by each $"$s$.$w$.$c$"$ string.