A nice touch is the illustrated spine that looks good on a shelf.
Item Tag: 1164
The Codebreakers – 1967 Hardcover by David Kahn – 1st Edition 2nd Printing HC/DJ
A nice touch in this activity book is the tips for solving each puzzle type.
The Codebreakers – 1967 Hardcover by David Kahn – 1st Edition 2nd Printing HC/DJ
A nice touch in this activity book is the perforated pages for easy removal.