Puzzlers will have fun and hone their powers of observation with amazing pictures from around the globe! Puzzle solvers will learn about hundreds of famous landmarks and locations with Travel Trivia added to each puzzle. There are 4 different skill levels, so the challenge builds up as sleuthing skills become more acute. These books are highly portable, so puzzles can be worked on the bus or at the beach - or anywhere! Spiral-bound, measures 20.3cm x 23cm.