To satisfy the spy in everyone, a vintage-looking covert booklet with a sneaky cipher wheel inside. Write and decipher coded messages using a substitution cipher method by turning the wheel inside the front cover. Write your message on the included notepad inside. To write messages with a friend, make sure you're both using the same cipher wheel, set to the same key letter. (So two booklets might be helpful, or more if you want to trade messages with a group.) Instructions are included on the first page of the notepad inside. — Details — Front: frame and dotted lines for labeling your booklet, printed in black or metallic silver letterpress ink Inside: cipher wheel for encoding and decoding secret messages, notepad with instructions on first page and blank pages beneath Materials: paper, eyelets, paper button, brown linen string, red padding compound Size: 4-1/2" x 6-1/2" x 1/4" when closed, 9-1/4" x 6-1/2" when open Printing method: letterpress