Think “spot the difference” puzzles are easy? Think again. With 38 glorious images to compare, Extreme Spot the Difference is one of the toughest and most enjoyable puzzle books ever published. Each carefully chosen, high-resolution photographic vista has been cunningly modified with no fewer than 50 subtle and ingenious changes.

The images feature a variety of subjects and scenes, from cityscapes and amusement parks to starry skies and fleets of sailboats in the blue sea. Try it and you’ll never look at this type of puzzle the same way again. The book includes a unique transparent plastic Spotter’s Grid to help you identify the changes and track your solutions.