Sudoku for smarts adults: over 300 sudoku puzzles

If you want to relax, do a sudoku, if you want to entertain yourself, do a sudoku and if you want to put your mind to work, do a sudoku. You can start the day with a sudoku to put your mind to work or at the end of the day to relax, you decide. more than 300 9x9 sudokus 155 pages Size: 6 x 9