Variations on Junior Sudoku Logic Puzzles (Vol 1) 
 Chapter 4: Sixteen Easy Sudoku-4 Puzzles (numbers 17-32) 
 
-  Step-by-step instructions for solving  Puzzle 17, (10/16)   Diff: 3/541
 -  Step-by-step instructions for solving  Puzzle 18, (10/16)   Diff: 3/532
 -  Step-by-step instructions for solving  Puzzle 19, (11/16)   Diff: 3/632
 -  Step-by-step instructions for solving  Puzzle 20, (12/16)   Diff: 3/561
 -  Step-by-step instructions for solving  Puzzle 21, (12/16)   Diff: 3/561
 -  Step-by-step instructions for solving  Puzzle 22, (12/16)   Diff: 3/561
 -  Step-by-step instructions for solving  Puzzle 23, (12/16)   Diff: 3/552
 -  Step-by-step instructions for solving  Puzzle 24, (12/16)   Diff: 3/534
 -  Step-by-step instructions for solving  Puzzle 25, (12/16)   Diff: 3/462
 -  Step-by-step instructions for solving  Puzzle 26, (12/16)   Diff: 3/462
 -  Step-by-step instructions for solving  Puzzle 27, (12/16)   Diff: 3/462
 -  Step-by-step instructions for solving  Puzzle 28, (12/16)   Diff: 3/462
 -  Step-by-step instructions for solving  Puzzle 29, (12/16)   Diff: 3/462
 -  Step-by-step instructions for solving  Puzzle 30, (12/16)   Diff: 3/462
 -  Step-by-step instructions for solving  Puzzle 31, (12/16)   Diff: 3/462
 -  Step-by-step instructions for solving  Puzzle 32, (12/16)   Diff: 3/462