Put down the smartphone. Give your brain some pleasure. Spend nice time-solving sudoku with Albert Einstein. Difficulty levels: Easy - 50 puzzles Medium - 50 puzzles Hard - 50 puzzles Bonus: Einstein difficulty- 25 puzzles Total of 175 great puzzles. Answer Keys Included. The perfect gift for children and adults. Perfect for Traveling! You not buy book of puzzles. You buy good spend time.
