Easy Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 24: Two Easy (DiffLev 4) Discoverably Puzzles (numbers 127-128) 
 
-  Step-by-step instructions for solving  Puzzle 127, (65/144)   Diff: 4/9983
 -  Step-by-step instructions for solving  Puzzle 128, (68/144)   Diff: 4/9993