Relax and take it easy with these code break puzzle books by Martello.
Measures 270mm x 197mm (10.6" x 7.7"), books 1 and 2 as shown.
Includes a colourful card front and back cover, laminated for added protection.
Each book contains 129 code break puzzles on 60gsm recycled paper.
Solutions provided at the back.
These entertaining puzzles will occupy your mind for hours and perfect for lazy days at home, travelling or holidays.