Variations on Junior Sudoku Logic Puzzles (Vol 1) 
 Chapter 3: Sixteen Easiest Sudoku-4 Puzzles (numbers 1-16) 
 
-  Step-by-step instructions for solving  Puzzle 1, (7/16)   Diff: 2/61
 -  Step-by-step instructions for solving  Puzzle 2, (7/16)   Diff: 2/61
 -  Step-by-step instructions for solving  Puzzle 3, (8/16)   Diff: 2/71
 -  Step-by-step instructions for solving  Puzzle 4, (8/16)   Diff: 2/71
 -  Step-by-step instructions for solving  Puzzle 5, (8/16)   Diff: 2/71
 -  Step-by-step instructions for solving  Puzzle 6, (8/16)   Diff: 2/53
 -  Step-by-step instructions for solving  Puzzle 7, (9/16)   Diff: 2/81
 -  Step-by-step instructions for solving  Puzzle 8, (9/16)   Diff: 2/81
 -  Step-by-step instructions for solving  Puzzle 9, (9/16)   Diff: 2/72
 -  Step-by-step instructions for solving  Puzzle 10, (9/16)   Diff: 2/72
 -  Step-by-step instructions for solving  Puzzle 11, (9/16)   Diff: 2/72
 -  Step-by-step instructions for solving  Puzzle 12, (9/16)   Diff: 2/63
 -  Step-by-step instructions for solving  Puzzle 13, (10/16)   Diff: 2/82
 -  Step-by-step instructions for solving  Puzzle 14, (10/16)   Diff: 2/64
 -  Step-by-step instructions for solving  Puzzle 15, (10/16)   Diff: 2/64
 -  Step-by-step instructions for solving  Puzzle 16, (10/16)   Diff: 2/55