Brain Games Picture Puzzles: Remember the 1970s is perfect for puzzlers who love the vintage look and liberated feel of this freewheeling decade. Keep your keen sense of observation working overtime!Two nostalgic pictures that seemingly are identical are presented together, but subtle changes have been made to one of the pictures. It's up to you to spot what has been altered.With more than 80 photographs of iconic and influential era, there are hours and hours of puzzles to work on.There are 4 different skill levels, so the challenge builds up as the puzzler's sleuthing skills become more acute.Spiral bound, 160 pages.