Brain Games Picture Puzzles: How Many Differences Can You Find? is a challenging puzzle book designed to test your powers of observation. Each puzzle has two or more pictures that seemingly are identical, but subtle changes have been made to one of the pictures it's up to you to find the differences. As you progress to more difficult puzzles, the differences become more subtle, the number of changes increases, and the pictures are more densely detailed. Solutions are provided at the back of the book; the original picture is presented with the changes clearly circled and numbered. Part of the popular Brain Games series, this entertaining picture puzzle book includes: More than 140 picture puzzles at four levels of difficulty. A wide variety of beautifully photographed indoor and outdoor scenes, from pictures of familiar home, garden, and store settings to exotic locales like a Spanish bullring and a Burmese festival. Brain Games Picture Puzzles: How Many Differences Can You Find? is spiral-bound and easy to handle. You can enjoy the picture challenges at home, on public transportation, in a long security line at the airport, or at the beach. Use it any time to put your brain to work and hone your powers of observation.