Discover all of the fun of our Challenging Books in one deluxe volume! This jumbo book is jam-packed with the very best puzzles from our popular series, including dot-to-dot, mazes, picture puzzles, and spot the difference puzzles. Beat this: children must find up to 100 differences in each odd one out puzzle in record time. Puzzles will challenge kids (answers are in the back) and get them racing to solve each one. Color them...