Group Puzzles (Sudoku Generalized)  Variations on Challenging Sudoku Logic Puzzles, Volume 1.
  1. Teaching Logic using Group Puzzles
  2. Solving Group Logic Puzzles
  3. Eight Challenging Sudoku Puzzles (numbers 1-8)
  4. Eight Challenging Sudoku-X Puzzles (numbers 9-16)
  5. Eight Challenging HyperSudoku Puzzles (numbers 17-24)
  6. Eight Challenging HyperSudoku-X Puzzles (numbers 25-32)