Cipher

French-fold book(s) about keys and locks. The outward facing book expresses information about literal keys and locks, with another inward facing book about figurative key and lock mechanisms. This included secret societies, ciphers, codes and hidden organisations.
The book is bound in a French Fold technique with cut outs throughout the pages to show through the hidden information behind.The inner pages can only be viewed through
cut-outs or by peering through the top and bottom of the page folds, akin to the act of peeking through a keyhole to access the forbidden within.