Offers the most fun anyone can have with a book! And puzzlers can keep their keen sense of observation working overtime! With dozens of interesting and beautiful photographs, there are hours and hours of puzzles to work on. Includes 4 different skill levels, so the challenge builds up as the puzzler's sleuthing skills become more acute. Portable book so puzzlers can work these brain teasers on the bus or at the beach - or anywhere! Spiral-bound, measures 20.3cm x 23cm.